question

Pluto's orbit sometimes causes this planet to be the ninth, and not the eighth, planet from the Sun.

answer

Neptune

question

A "shooting star," or meteor, is actually a meteoroid that burns up in Earth's atmosphere.

answer

True

question

____ is the third planet from the Sun.

answer

Earth

question

Earth's axis of rotation is almost parallel to the plane of its orbit

answer

False

question

The surface of Mars has long channels that may have been caused by flowing water

answer

True

question

The outer planets are small, rocky planets with iron cores.

answer

False

question

Methane absorbs the red and yellow light on ____, while the clouds of these planets reflect the green and blue light

answer

Uranus and Neptune

question

The Sun was formed when energy caused by ____ in the center of the cloud of gas and dust radiated into space.

answer

Nuclear Fusion

question

____ is the largest planet in the solar system, is the fifth planet from the Sun, and has colorful clouds. One of its 17 moons is the most volcanically active object in the solar system. The planet has a liquid ocean and atmosphere comprised mostly of hydrogen and helium. It may have a rocky core, although its extreme pressure and temperature would make the core different from any rock on Earth.

answer

Jupiter

question

A comet develops a tail because of ____.

answer

The Solar Wind

question

____ is an outer planet with an unusual orbit.

answer

Pluto

question

Evidence suggests that ____ originate in the Oort Cloud located beyond the orbit of Pluto.

answer

Comets

question

____ are pieces of rock that strike the surface of a moon or planet.

answer

Meteorites

question

Planets formed from ____ left over from the formation of the Sun at the center of the cloud.

answer

Gas, ice, and dust

question

Most of the frozen ice in a comet's ____ vaporizes after the comet's many trips around the Sun.

answer

Nucleus

question

Solar energy trapped by gases in Venus's atmosphere causes ____.

answer

The Greenhouse effect

question

Pluto differs from the other outer planets in that ____.

answer

All of the above

question

Pluto's moon, ____, has a diameter equal to half of Pluto's

answer

Charon

question

Neptune was the last planet to be visited by the ____ space probe.

answer

Voyager ll

question

Smaller pieces of rock from old, broken-up comets become ____.

answer

Meteoroids

question

Venus and Earth both experience a ____ because of heat trapped by their atmospheres.

answer

Greenhouse Effect

question

The Oort cloud is a large collection of comets that surrounds the solar system.

answer

True

question

Scientists hypothesize that the Sun formed ____.

answer

From a cloud of gas and dust

question

Two of the inner planets are ____.

answer

Mars and Venus

question

Mercury is the ____ planet from the Sun.

answer

First

question

Saturn's density is so low that the entire planet could float in water.

answer

True

question

Water is found as a solid, liquid, and gas on ____.

answer

Earth

question

Io, the closest large moon to Saturn, is volcanically active.

answer

False

question

Ganymede is a volcano on the planet Jupiter

answer

False

question

In 1543, ____ published his views of Earth and other planets revolving around the Sun.

answer

Copernicus

question

Venus experiences an intense greenhouse effect.

answer

True

question

Vaporized gases and released dust form a bright cloud called a(n) ____ around the solid part of a comet.

answer

Coma

question

Pluto is considered the ____ planet.

answer

Ninth

question

Scientists know the least about the planet ____.

answer

Pluto

question

The first and only American space mission to Mercury was ____.

answer

Mariner 10

question

One of ____ moons is larger than the planets Pluto and Mercury.

answer

Saturn's

question

One of ____ moons is larger than the planets Pluto and Mercury

answer

Mercury, Venus, Earth, and Mars

question

____ for a planet to form in the asteroid belt.

answer

Jupiter's galaxy may been too great

question

Match the comet parts below with the letters labeling the parts in Figure 24-2. 1. Tail 2. Coma 3. Nucleus

answer

1. C 2. B 3. A

question

____ has colorful clouds in bands of white, red, tan, and brown.

answer

Jupiter

question

People once believed that all planets and stars orbited around ____.

answer

Earth

question

Pluto is different from the other outer planets because ____.

answer

None of the Above

question

Name Planets

answer

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

question

The greenhouse effect on Earth keeps it warm enough for liquid water to exist. However, on Venus, the greenhouse effect warms the planet to ____.

answer

475*C

question

The orbits of ____ lie closer to the Sun than does Earth's orbit.

answer

Mercury and Venus

question

Small pieces of rock that enter Earth's atmosphere at speeds of 15 to 70 km/s and burn up are called ____.

answer

Meteors

question

This planet has no true atmosphere.

answer

Mercury

question

Dark-colored storms and eight moons

answer

Maria

question

Iron oxide and polar ice caps

answer

Mars

question

Largest planet

answer

Jupiter

question

Smallest planet

answer

Pluto

question

Axis of rotation tilted on its side

answer

Uranus

question

Greenhouse effect causes extremely high surface temperatures

answer

Venus

question

Craters, cliffs, and a weak magnetic field

answer

Mercury

question

Liquid water oceans

answer

Earth

question

Most complex ring system

answer

Saturn

question

____ was the first planet studied by the Voyager space probes.

answer

Jupiter

question

The structure of a comet is considered to be like a large, ____, or a mass of frozen ice and rock

answer

Dirty Snowball

question

A comet develops a coma because of ____.

answer

Heat from the Sun

question

The Viking landers sent back pictures of the reddish-colored, barren, rocky, windswept surface of ____.

answer

Mars

question

Galileo used his telescope to discover evidence for the Sun-centered model of the solar system. This evidence included all of the following EXCEPT ____.

answer

The discovery of Neptune and Pluto

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