question

The overall result of the proton-proton chain is that

answer

4 H becomes 1 He + energy

question

To estimate the central temperature of the Sun, scientists

answer

use computer models to predict interior conditions

question

How is the sunspot cycle directly relevant to us here on Earth?

answer

Coronal mass ejections and other activity associated with the sunspot cycle can disrupt radio communications and knock out sensitive electronic equipment.

question

Different layers of the sun's atmosphere: rank from first encountered to last encountered

answer

corona, chromosphere, photosphere

question

Rank the layers of the Sun's atmosphere based on their density, from highest to lowest.

answer

photosphere, chromosphere, corona

question

Rank the layers of the Sun's atmosphere based on their temperature, from highest to lowest.

answer

corona, chromosphere, photosphere

question

Rank the layers of the atmosphere based on the energy of the photons that are typically emitted there, from highest to lowest.

answer

corona, chromosphere, photosphere

question

Which changes would cause the fusion rate in the Sun's core to increase?

answer

An increase in the core temperature A decrease in the core radius

question

Which of the following must occur for a star's core to reach equilibrium after an initial change in fusion rate?

answer

If the fusion rate initially increases, then the core expands. If the fusion rate initially decreases, then the core contracts.

question

What would happen if the fusion rate in the core of the Sun were increased but the core could not expand?

answer

The Sun's core would start to heat up and the rate of fusion would increase even more.

question

Nuclear fusion of hydrogen into helium occurs in the

answer

core

question

Energy moves through the Sun's _______ by means of the rising of hot gas and falling of cooler gas.

answer

convection zone

question

Nearly all the visible light we see from the Sun is emitted from the

answer

photosphere

question

Most of the Sun's ultraviolet light is emitted from the narrow layer called the ______ where temperature increases with altitude.

answer

chromosphere

question

We can see the Sun's ______ most easily during total solar eclipses.

answer

corona

question

The ________ is the layer of the Sun between its core and convection zone.

answer

radiation zone

question

X-ray images of the Sun generally show the

answer

corona

question

How does the number of neutrinos passing through your body at night compare with the number passing through your body during the day?

answer

about the same

question

Which of these groups of particles has the greatest mass?

answer

4 individual protons

question

At the center of the Sun, fusion converts hydrogen into

answer

helium, energy, and neutrinos

question

Solar energy leaves the core of the Sun in the form of

answer

photons

question

Sunspots appear darker than their surroundings because they

answer

are cooler then their surroundings

question

What causes the cycle of solar activity?

answer

changes in the organization of the Sun's magnetic field

question

What thing poses the greatest hazard to communications satellites?

answer

particles from the Sun

question

energy balance

answer

the balance between the rate a which fusion releases energy into the star's core and the rate at which the star's surface radiates this energy into space.

question

sunspot cycle

answer

periods of 11 years over which the number of sunspots on the sun rises and falls

Astronomy Chapter 11 Flashcard

Unlock all answers in this set

Haven't found what you were looking for?

Search for samples, answers to your questions and flashcards