question

universe

answer

totality of all space, time, matter, and energy

question

astronomy

answer

study of the universe

question

light-years

answer

distance that light, moving at a constant speed of 300,000 km/s, travels in one year. One of these is about 10 trillion kilometers

question

theory

answer

framework of ideas and assumptions used to explain some set of observations and make predictions about the real world

question

theoretical model

answer

attempt to construct a mathematical explanation of a physical process or phenomenon, within the assumptions and confines of a given theory. the model generally makes new predictions that can be tested by further observation

question

scientific method

answer

set of rules used to guide science, based on the idea that scientific "laws" by continually tested, and modified or replaced if found inadequate

question

constellations

answer

human grouping of stars in the night sky into a recognizable pattern

question

celestial sphere

answer

imaginary sphere surrounding Earth to which all objects in the sky were once considered to be attached

question

rotation

answer

spinning motion of a body about an axis

question

celestial poles

answer

projection of Earth's North and South pole onto the celestial sphere

question

celestial equator

answer

projection of Earth's equator onto the celestial sphere

question

solar day

answer

period of time between the instant when the Sun is directly overhead (i.e. noon) to the next time it is directly overhead

question

sidereal day

answer

time needed between successive risings of a given star

question

diurnal motion

answer

daily progress of the sun and the other stars across the sky is known as

question

revolution

answer

orbital motion of one body about another, such as Earth about the Sun

question

zodiac

answer

12 constellations on the celestial sphere through which the Sun appears to pass during the course of a year

question

summer solstice

answer

point on the ecliptic where the Sun is at its northernmost point above the celestial equator, occurring on or near June 21

question

winter solstice

answer

point on the ecliptic where the Sun is at its southernmost point below the celestial equator, occurring on or near December 21

question

seasons

answer

changes in average temperature and length of day that result from the tilt of Earth's (or any planet's) axis with respect to the plane of its orbit

question

autumnal equinox

answer

date on which the Sun crosses the celestial equator moving southward, occurring on or near September

question

vernal equinox

answer

date on which the Sun crosses the celestial equator moving northward, occurring on or near March 21

question

tropical year

answer

the time interval between one vernal equinox and the next

question

precession

answer

slow change in the direction of the rotation axis of a spinning object, caused by some external gravitation influence

question

sidereal year

answer

time required for the constellations to complete one cycle around the sky and return to their starting points, as seen from a given point on Earth.

question

phases

answer

appearance of the sunlit face of the moon at different points along its orbit, as seen from Earth

question

new Moon

answer

all but invisible in the sky

question

quarter Moon

answer

one week after new Moon, half of the lunar disk can be seen

question

sidereal month

answer

time required for the moon to complete one trip around the celestial sphere

question

eclipse

answer

event during which one body passes in front of another, so that the light from the occulted body is blocked

question

lunar eclipse

answer

celestial event during which the moon passes through the shadow of Earth, temporarily darkening its surface

question

partial eclipse

answer

celestial event during which only a part of the occulted body is blocked from view

question

total eclipse

answer

celestial event during which one body is completely blocked from view by another

question

solar eclipse

answer

celestial event during which the new moon passes directly between Earth and the sun, temporarily blocking the sun's light

question

total solar eclipse

answer

alignment is perfect, planets and some stars become visible in the daytime as the Sun's light is reduced to nearly nothing

question

partial solar eclipse

answer

Moon's path is slightly "off center" and only a portion of the Sun's face is covered

question

umbra

answer

central region of the shadow cast by an eclipsing body

question

penumbra

answer

portion of the shadow cast by an eclipsing object in which the eclipse is seen as partial

question

annular eclipse

answer

solar eclipse occurring at a time when the moon is far enough away from Earth that it fails to cover the disk of the Sun completely, leaving a ring of sunlight visible around its edge

question

line of nodes

answer

line of intersection of Earth's and the Moon's orbital planes

question

eclipse seasons

answer

time of the year when the moon lies in the same plane as Earth and Sun, so that eclipses are possible

question

triangulation

answer

method of determining distance based on the principles of geometry. a distant object is sighted from two well-separated locations. distance between the two locations and the angle between the line joining them and the line to the distant object are all that are necessary to ascertain the object's distance

question

cosmic distance scale

answer

collection of indirect distance-measurement techniques that astronomers use to measure distances in the universe

question

parallax

answer

apparent motion of a relatively close object with respect to a more distant background as the location of the observer changese

question

supernova

answer

explosion of a giant star, which scattered most of its mass into spaces

question

cosmology

answer

study of the workings of the universe on the largest scales

question

retrograde motion

answer

backward, westward loop traced out by a planet with respect to the fixed stars

question

geocentric

answer

model of the solar system that holds that Earth is at the center of the universe and all other bodies are in orbit around it. Earliest theories of the solar system were geocentric

question

epicycle

answer

construct of the geocentric model of the solar system which was necessary to explain observed planetary motions. each planet rides on a small ________ whose center in turn rides on a larger circle (the deferent)

question

deferent

answer

construct of the geocentric model of the solar system which was needed to explain observed planetary motions. large cirlce encircling earth, on which an epicycle moves

question

Ptolemaic model

answer

geocentric solar system model, developed by the second-century astronomer Cladius Ptolemy. predicted with great accuracy the positions of the then known planets

question

heliocentric

answer

model of the solar system that is centered on the sun, with earth in motion about the sun

question

Copernican revolution

answer

realization, toward the end of the 16th century, that earth is not at the center of the universe

question

aberration of starlight

answer

small shift in the observed direction to a star, caused by Earth's motion perpendicular to the line of sight

question

Copernican principle

answer

removal of Earth from any position of great cosmic significance is generally known as

question

laws of planetary motion

answer

three laws derived by kepler describing the motion of the planets around the sun

question

ellipse

answer

geometric figure resembling an elongated circle. characterized by its degree of flatness, or eccentricity, and the length of its long axis.

question

focus

answer

one of two special points within an ellipse, whose separation from each other indicates the eccentricity.

question

semimajor axis

answer

one-half of the major axis of an ellipse. the way in which the size of an ellipse is usually quantifies

question

eccentricity

answer

measure of the flatness of an ellipse, equal to the distance between the two foci divided by the length of its major axis

question

Kepler's first law

answer

Orbital paths of the planets are elliptical (not circular) with the Sun at one focus

question

Kepler's second law

answer

An imaginary line connecting the Sun to any planet sweeps out equal areas of the ellipse in equal intervals of time

question

period

answer

time needed for an orbiting body complete one revolution about another body

question

Kepler's third law

answer

Square of a planet's orbital period is proportional to the cube of its semimajor axis

question

astronomical unit

answer

average distance of Earth from the Sun.

question

radar

answer

acronym for radio detection and ranging. radio waves are bounced off an object, and the time taken for the echo to return indicates its distance

question

weight

answer

gravitational force exerted on you by earth

question

force

answer

action on an object that causes its momentum to change. the rate at which the momentum changes is numerically equal to the force

question

inertia

answer

tendency of an object to continue moving at the same speed and in the same direction

question

mass

answer

measure of the total amount of matter contained within an object

question

velocity

answer

displacement (distance plus direction) per unit time

question

acceleration

answer

gradual growth of bodies, such as planets, by the accumulation of other smaller bodies

question

gravity

answer

attractive effect that any massive object has on all other massive objects

question

gravitational force

answer

force exerted on one body by another due to the effect of gravity. force is directly proportional to the masses of both bodies involved and inversely proportional to the square of the distance between them

question

inverse-square law

answer

law that a field follows if its strength decreases with the square of the distance. fields that follow this decrease rapidly in strength as the distance increase, but never quite reach zero

question

center of mass

answer

"average" position in space of a collection of massive bodies, weighted by their masses. for an isolated system this point moves with constant velocity, according to Newtonian mechanics

question

escape speed

answer

speed necessary for one object to escape the gravitational pull of another. anything that moves away from a gravitation body with more than the escape speed will never return

question

unbound

answer

orbit which does not stay in a specific region of space, but where an object escapes the gravitational field of another.

question

electromagnetic radiation

answer

another term for light, transfers energy and information from one place to another

question

visible light

answer

small range of the electromagnetic spectrum that human eyes perceive as light. visible spectrum ranges from about 4000-7000 angstroms, corresponding to blue through red light

question

radio

answer

region of electromagnetic spectrum corresponding to the longest wavelength radiation

question

infrared

answer

region of the electromagnetic spectrum just outside the visible range, corresponding to light of a slightly longer wavelength than red light

question

x-rays

answer

region of the electromagnetic spectrum corresponding to radiation of high frequency and short wavelength, far beyond the visible spectrum

question

gamma rays

answer

region of the electromagnetic spectrum, far beyond the visible spectrum, corresponding to radiation of very high frequency and very short wavelength

question

waves

answer

pattern that repeats itself cyclically in both time and space. characterized by the speed at which they move, their frequency, and their wavelength

question

amplitude

answer

maximum deviation of a wave above or below the zero point

question

frequency

answer

number of wave crests passing any given point in a unit time

question

electron

answer

elementary particle with a negative electric charge; one of the components of the atom

question

proton

answer

elementary particle carrying a positive electric charge, a component of all atomic nuclei. number of these in the nucleus of an atom dictates what type of atom it is

question

electric field

answer

field extending outward in all directions from a charged particle, such as a proton or electron. determines the electric force exerted by the particle on all other charged particles in the universe; the strength of this decreases with increasing distance from the charge according to an inverse-square law

question

magnetic field

answer

field that accompanies any changing electric field and governs the influence of magnetized objects on one another

question

electromagnetism

answer

union of electricity and magnetism, which do not exist as independent quantities but are in reality two aspects of a single physical phenomenon

question

wave theory of radiation

answer

description of light as a continuous wave phenomenon, rather than as a stream of individual particles

question

electromagnetic spectrum

answer

complete range of electromagnetic radiation, from radio waves to gamma rays, including the visible spectrum. all types of electromagnetic radiation are basically the same phenomenon, differing only by wavelength, and all move at the speed of light

question

opacity

answer

quantity that measures a material's ability to block electromagnetic radiation

question

diffraction

answer

ability of waves to bend around corners. establishes its wave nature

question

interference

answer

ability of two or more waves to interact in such a way that they either reinforce or cancel each other

question

temperature

answer

measure of the amount of heat in an object, and an indication of the speed of the particles that comprise it

question

blackbody curve

answer

characteristic way in which the intensity of radiation emitted by a hot object depends on frequency. frequency at which the emitted intensity is highest is an indication of the temperature of the radiating object

question

Wien's Law

answer

relation between the wavelength at which a black body curve peaks and the temperature of the emitter. the peak wavelength is inversely proportional to the temperature, so the hotter the object, the bluer its radiation

question

Stefan's law

answer

relation that gives the total energy emitted per square centimeter of its surface per second by an object of a given temperature. shows that the energy emitted increases rapidly with an increase in temperature, proportional to the temperature raised to the fourth power

question

Doppler effect

answer

any motion-induced change in the observed wavelength (or frequency) of a wave

question

spectroscope

answer

instrument used to view a light source so that it is split into its component colors

question

continuous spectra

answer

spectrum in which the radiation is distributed over all frequencies, not just a few specific frequency ranges. A prime example is the blackbody radiation emitted by a hot, dense body

question

emission lines

answer

bright line in a specific location of the spectrum of radiating material, corresponding to emission of light at a certain frequency. A heated gas in a glass container produces emission lines in its spectrum

question

emission spectrum

answer

pattern of spectral emission lines produced by an element

question

absorption lines

answer

dark line in an otherwise continuous bright spectrum, where light within one narrow frequency range has been removed

question

spectroscopy

answer

study of the way in which atoms absorb and emit electromagnetic radiation. allows astronomers to determine the chemical composition of stars

question

Kirchhoff's laws

answer

three rules governing the formation of different types of spectra

question

atoms

answer

building block of matter, composed of positively charged protons and neutral neutrons in the nucleus surrounded by negatively charged electrons

question

nucleus

answer

dense, central region of an atom, containing both protons and neutrons, and orbited by one or more electrons

question

ground state

answer

lowest energy state that an electron can have within an atom

question

ionized

answer

state of an atom or molecule that has lost one or more of its electrons

question

orbitals

answer

one of several energy states in which an electron can exist in an atom

question

quantized

answer

fact that light and matter on small scales behave in a discontinuous manner, and manifest themselves in the form of tiny "packets" of energy, call quanta

question

quantum mechanics

answer

laws of physics as they apply on atomic scales

question

excited state

answer

state of an atom when one of its electrons is in a higher energy orbital than the ground state

question

photons

answer

individual packet of electromagnetic energy that makes up electromagnetic radiation

question

photoelectric effect

answer

emission of an electron from a surface when a photon of electromagnetic radiation is absorbed

question

element

answer

matter made up of one particular atom. number of protons in the nucleus of the atom determines which _______ it represents

question

neutrons

answer

an elementary particle with roughly the same mass as a proton, but which is electrically neutral. form the nuclei of atoms

question

molecule

answer

a tightly bound collection of atoms held together by the atoms' electromagnetic fields. emit and absorb photons at specific wavelengths

question

telescope

answer

instrument used to capture as many photons as possible from a given region of the sky and concentrate them into a focused beam for analysis

question

refraction

answer

tendency of a wave to bend as it passes from one transparent medium to another

question

refracting telescope

answer

a telescope that uses a lens to gather and focus light from a distant object

question

reflecting telescope

answer

a telescope which uses a curved mirror to focus light from a distant object

question

prime focus

answer

point in a reflecting telescope where the mirror focuses incoming light to a point

question

images

answer

optical representation of an object produced when the object is reflected or refracted by a mirror or lens

question

Newtonian telescope

answer

basic laws of motion, postulated by Newton, which are sufficient to explain and quantify virtually all of the complex dynamical behavior found on Earth and elsewhere in the universe

question

Cassegrian telescope

answer

type of reflecting telescope in which incoming light hits the primary mirror and is then reflected upward toward the prime focus, where a secondary mirror reflects the light back down through a small hole in the main mirror into a detector or eyepiece

question

angular resolution

answer

ability of a telescope to distinguish between adjacent objects in the sky

question

diffraction-limited resolution

answer

theoretical resolution that a telescope can have due to diffraction of light at the telescope's aperture. depends on the wavelength of radiation and the diameter of the telescope's mirror

question

charge-coupled devices (CCDs)

answer

electronic device used for data acquisition; composed of many tiny pixels, each of which records a buildup of charge to measure the amount of light striking it

question

photometry

answer

branch of observational astronomy in which the brightness of a source is measured through each of a set of standard filters

question

spectrometer

answer

instrument used to produce detailed spectra of stars. records a spectrum on a photographic plate, or more recently, in electronic form on a computer

question

photometer

answer

a device that measures the total amount of light received in all or part of the image

question

seeing

answer

term used to describe the ease with which good telescopic observations can be made from Earth's surface, given the blurring effects of atmospheric turbulence

question

seeing disk

answer

roughly circular region on a detector over which a star's point-like images is spread, due to atmospheric turbulence

question

light pollution

answer

unwanted upward-directed light from streets, homes, and businesses, that scatters back to Earth from dust in the air, obscuring the faint objects that astronomers want to observe

question

active optics

answer

collection of techniques used to increase the resolution of ground-based telescopes. minute modifications are made to the overall configuration of an instrument as its temperature and orientation change; used to maintain the best possible focus at all timesla

question

adaptive optics

answer

collection of techniques used to increase the resolution of a telescope by deforming the shape of the mirror's surface under computer control while a measurement is being taken; used to undo the effects of atmospheric turbulence

question

radio telescopes

answer

large instrument designed to detect radiation from space at radio wavelengths

question

interferometry

answer

technique in widespread use to dramatically improve the resolution of radio and infrared maps. several telescopes observe the object simultaneously, and a computer analyzes how the signals interfere with each other

question

interferometer

answer

collection of two or more telescopes working together as a team, observing the same object at the same time and the same wavelength. effective diameter of an this is equal to the distance between its outermost telescopes

question

infrared telescopes

answer

telescope designed to detect infrared radiation. many such telescopes are designed to be lightweight so that they can be carried above (most of) Earth's atmosphere by balloons, airplanes, or satellites

question

ultraviolet telescope

answer

telescope that is designed to collect radiation in the ultraviolet part of the spectrum. earth's atmosphere is partially opaque to these wavelengths, so ultraviolet telescopes are put on rockets, balloons, and satellites to get high above most or all of the atmosphere

question

high-energy telescopes

answer

telescope designed to detect X- and gamma-ray radiation

question

collecting area

answer

total area of a telescope capable of capturing incoming radiation. larger the telescope, the greater its __________ and the fainter the objects it can detect

question

pixels

answer

one of many tiny picture elements, organized into a two dimensional array making up a digital image

question

solar system

answer

sun and all the bodies that orbit it -- Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, their moons, the asteroids, the comets, and trans-Neptunian objects

question

comparative planetology

answer

systematic study of the similarities and differences among the planets, with the goal of obtaining deeper insight into how the solar system formed and has evolved in time

question

density

answer

measure of the compactness of the matter within an object, computed by dividing the mass of the object by its volum

question

terrestrial planets

answer

one of the four innermost planets of the solar system, resembling Earth in general physical and chemical properties

question

nebular theory

answer

one of the earliest models of the solar system formation, dating back to Descartes, in which a large cloud of gas began to collapse under its own gravity to form the Sun and planets

question

solar nebula

answer

swirling gas surrounding the early Sun during the epoch of solar system formation, also referred to as the primitive solar system

question

condensation theory

answer

currently favored model of solar system formation which combines features of the old nebular theory with new information about interstellar dust grains, which acted as condensation nuclei

question

planetsimals

answer

term given to objects in the early solar system that had reached the size of small moons, at which point their gravitational fields were strong enough to begin influencing their neighbors

question

gravitational instability theory

answer

theory that the jovian planets formed directly from the solar nebula via instabilities in the gas leading to gravitational contraction

question

core-accretion theory

answer

theory that the jovian planets formed when icy protoplanetary cores became massive enough to capture gas directly from the solar nebula

question

core

answer

central region of Earth, surrounded by the mantle

question

mantle

answer

layer of Earth just interior to the crust

question

crust

answer

layer of Earth which contains the solid continents and the seafloor

question

hydrosphere

answer

layer of Earth that contains the liquid oceans and accounts for roughly 70% of Earth's total surface area

question

atmosphere

answer

layer of gas confined close to a planet's surface by the force of gravity

question

troposphere

answer

portion of Earth's atmosphere from the surface to about 12 km

question

convection

answer

churning motion resulting from the constant upwelling of warm fluid and the concurrent downward flow of cooler material to take its place

question

magnetosphere

answer

a zone of charged particles trapped by a plent's magnetic field, lying above the atmosphere

question

ionosphere

answer

layer in Earth's atmosphere above about 80 km where the atmosphere is significantly ionized and conducts electricity

question

stratosphere

answer

portion of Earth's atmosphere lying above the troposphere, extending up to an altitude of 40 - 50 km

question

ozone layer

answer

layer of Earth's atmosphere at an altitude of 20 - 50 km where incoming ultraviolet solar radiation is absorbed by oxygen, ozone, and nitrogen in the atmosphere

question

greenhouse effect

answer

partial trapping of solar radiation by a planetary atmosphere, similar to the trapping of heat in a greenhouse

question

seismic waves

answer

a wave that travels outward from the site of an earthquake through Earth

question

inner core

answer

central part of Earth's core, thought to be solid, and composed mainly of nickel and iron

question

outer core

answer

outermost part of Earth's core, thought to be liquid and composed mainly of nickel and iron

question

differentiation

answer

variation in the density and composition of a body such as Earth, with low-density material on the surface and higher density material in the core

question

radioactive

answer

release of energy by rare, heavy elements when their nuclei decay into lighter nuclei

question

plate tectonics

answer

motions of regions of Earth's lithosphere, which drift with respect to one another aka continental drift

question

lithosphere

answer

Earth's crust and a small portion of the upper mantle that make up Earth's plates. this layer of Earth undergoes tectonic activity

question

asthenosphere

answer

layer of Earth's interior, just below the lithosphere, over which the surface plates slide

question

rock cycle

answer

process by which surface rock on Earth is continuously redistributed and transformed from one type into another

question

Van Allen belts

answer

one of at least two doughnut-shaped regions of magnetically trapped, charged particles high above Earth's atmosphere

question

dynamo theory

answer

theory that explains planetary and stellar magnetic fields in terms of rotating, conducting material flowing in an object's interior

question

tides

answer

rising and falling motion of terrestrial bodies of water, exhibiting daily, monthly, and yearly cycles.

question

aurora

answer

event that occurs when atmospheric molecules are excited by incoming charged particles from the solar wind, then emit energy as they fall back to their ground states. generally occur at high latitudes near the north and south magnetic poles

question

tidal bulges

answer

elongation of earth caused by the difference between the gravitational force on the side nearest the Moon and the force on the side farthest from the Moon. the long axis of this points toward the Moon. More generally, the deformation of any body produced by the tidal effect of a nearby gravitating object

question

theory, prediction, and observation

answer

The fundamental 3 elements in the scientific method are

question

in the same part of the sky

answer

Stars in a constellation are

question

spring, occurs around March 21-22

answer

vernal equinox

question

gravitation pull of both the Moon and the Sun

answer

Precession of the Earth's axis is caused by

question

wanning gibbous

answer

what is the name of the Moon's phase is 3/4 visible on left side

question

about every six months at new moon

answer

solar eclipse happens

question

decreases if the object is farther away

answer

angular diameter of an object

question

why retrograde motion occurred

answer

epicycles were used in Ptolemy's model to explain

question

the Sun revolved around the Earth

answer

How did the geocentric model account for day and night on Earth?

question

Sun is the center of the solar system

answer

heliocentric model assumes

question

Satellites of Jupiter

answer

Which of Gelilei's initial observations was most challenging to established geocentric beliefs?

question

he assumed planets moved in cycles

answer

Copernicus' heliocentric model was flawed because

question

period

answer

Kepler's third lawy relates a planet's distance from the Sun to its orbital...

question

Galileo Galilei

answer

Who published the first astronomical observations with a telescope?

question

Johannes Kepler

answer

Who published three empirical laws of planetary motion?

question

increase with the mass of the object

answer

Newton's laws of gravity states that the force between two objects

question

wavelength

answer

distance between successive wave crests defines the ________ of a wave

question

sound

answer

Which of the following waves is NOT a form of electromagnetic radiation

question

temperature

answer

frequency at which a star's intensity is greatest depends directly on its

question

toward higher frequencies

answer

the blackbody curve of a star moving towards earth would have its peak shifted

question

visible light and radio waves

answer

which two types of electromagnetic radiation from space reach the surface of Earth

question

at the same speed

answer

Compared with red light, blue wavelengths of visible light travels

question

are moving very fast

answer

temperature of an object has a specific meaning for its atoms. A very hot objects have atoms that

question

increase 16 times

answer

Stefan's law implies that if the Sun's temperature were to double, its energy emission would

question

hotter than

answer

Rigel appears as a bright bluish star, whereas Betelgeuse appears as a bright reddish star. Rigel is _______ than Betelgeuse

question

are identical to its absorption lines

answer

Wavelengths of the emission lines produced by an element

question

a photon is emitted

answer

when an electron in an atom moves from a higher energy level to a lower energy level

question

of a different composition

answer

compared with a star having many blue absorption lines, a star with many red and blue absorption lines must be

question

its spectral lines are shorter in wavelength

answer

if a light source is approaching you, you will observe

question

transverse velocity (side-to-side)

answer

what can analyzing a star's spectral lines not tell us ?

question

reflecting telescopes aren't affected by the atmosphere as much

answer

one reason why modern telescopes use mirrors rather than lenses

question

larger telescopes and shorter wavelengths

answer

resolution of a telescope is improved by using

question

HST orbits above the atmosphere

answer

Hubble Space Telescope offers sharper images than ground telescopes primarily because

question

advantages of CCDs over photographic film

answer

they don't require chemical development, digital data is easily stored and transmitted, CCDs are more light sensitive than film, CCD images can be developed faster

question

the image quality due to air turbulence

answer

"seeing" in astronomy is a measurement of

question

reducing atmospheric blurring using computer control

answer

adaptive optics refer to

question

observations can be made day and night

answer

radio telescopes are useful because

question

cool stars and star-forming regions

answer

infrared telescopes are very useful for observing

question

because of turbulence in the atmosphere

answer

Why do stars twinkle?

question

increase the range of waves they can collect

answer

Radio dishes are large in order to

question

angular resolution

answer

interferometry can greatly improve

question

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

answer

What is the correct order of the planets according to increasing distance from the Sun?

question

Mercury, Venus, Earth, Mars

answer

What are the terrestrial planets?

question

high average density

answer

What is NOT a characteristic of Jovian planets?

question

no

answer

is pluto a Jovian planet?

question

Oort Cloud

answer

What is the name of the most outer region of the Solar System, where many comets reside

question

no

answer

Does the theory of the origin of the Solar System that the direction that planets orbit the sun is opposite to the Sun's spin correct?

question

ancient material from the formation of the solar system

answer

Asteroids are evidence of

question

terrestrial planets are different from Jovian planets

answer

Condensation theory explains why

question

faster due to conservation of angular momentum

answer

as rotating gas cloud contracts, it spins:

question

growth of an object by the accumulation of matter

answer

What is the process of accretion?

question

ultraviolet radiation

answer

planetary atmosphere with ozone could protect surface dwellers from

question

troposphere

answer

within Earth's atmosphere, in which layer does convection occur?

question

synodic month

answer

time required for the Moon to complete a full cycle of phases

Astronomy Chapters 1 – 7 – Flashcards

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