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Test 2: Ch. 19 & 20
| Question | Answer |
|---|---|
| In which layer does fusion occur in our Sun? | The core: the very middle |
| How long does it take for energy in the Sun's core to reach the surface? | Millions of Years!! |
| What does Newton's law of gravity state about the force of gravity? | Larger mass objects have stronger gravity. Gravity increases as objects get closer to each other. |
| Who discovered the laws of planetary motion? | Johannes Kepler |
| What are Kepler's 3 laws of motion? | Take a look at your notes for this one! (Do it-- this will be on the test) |
| The inner planets' composition is ______________________, while the outer planets are ______________________. | rocky; gassy |
| Take a look at your bell ringer; explain why the inner planets' composition differs from that of the outer planets. | Make sure you're using complete sentences and answering ALL parts of the question. |
| The spin of a body on its axis: | rotation |
| Revolution | one completed orbit |
| orbit | the path a body takes around another body. |
| A cloud of gas and dust that produces stars & planets | Nebula |
| How does the number of sunspots change over time? | They increase in number every 11 years. |
| a brief eruption of intense high-energy radiation from the sun's surface, associated with sunspots and causing electromagnetic disturbances on the earth, as with radio frequency communications and power line transmissions. | solar flares |
| effects of solar flares include: | interrupted radio communications, interrupted satellite flight paths; Aurora Borealis (AKA Northern Lights) |
| The process of planetary formation | Check your notes- we had 5 steps |
| Nebulas collapse into disks due to the force of... | Gravity |
| An orbit is shaped like an | Ellipse |
| Fusion in a star makes the element _________________ fuse into _________________. | hydrogen; helium |
| Define Red Shift | The color of objects appears to be more reddish, which means that they're moving away from us. |
| Who used Red Shift to determine that the Universe is expanding? | Edwin Hubble |
| Look at the HR diagram in your book; most stars on the HR diagram are what kinds of stars? | main sequence |
| What is the coolest type of star on the HR diagram? | a red main sequence star |
| The pattern of absorption bands in an absorption spectrum represent what? | the elements in a star |
| What are the three shapes for a galaxy? | spiral, elliptical, irregular |
| The universe is organized: loosely, randomly, not at all? | loosely structured |
| What fills the empty space in the loose structure of the Universe? | dark matter |
| The scientific theory for the beginnings of the universe: | The Big Bang Theory |
| An HR diagram shows the relationship between a star's _____________________ and _______________ _______________. | temperature; absolute magnitude (AKA absolute brightness) |
Created by:
hryan
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