Term
| 1. What it the path called as that the Earth takes as it moves around the sun? |
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Definition
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| 2. What is it called when the Earth has made one full orbit around the sun? |
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Definition
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| 3. How many days does it take the Earth to make one full revolution around the sun? |
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Definition
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| 4. Why does the sun appear to rise and set? |
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Definition
| The rotation of the Earth on its axis |
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Term
| 5. What causes the Earth to have seasons? |
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Definition
| It revolves around the sun on a tilted axis |
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Term
| 6. What gives the Earth day and night? |
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Definition
| The rotation of the Earth as it travels around the sun |
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Term
| 7. How long does it take the Earth to complete one full rotation? |
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Definition
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Term
| 8. How many days does it take the moon to revolve around the Earth? |
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Definition
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Term
| 9. Why does the moon look different throughout the month? |
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Definition
| The positions of the Earth and moon change throughout the month |
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Term
| 10. What is Earth’s moon? |
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Definition
| A small rocky satellite (rock and rock fragments) |
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Term
| 11. How large is Earth’s moon compared to Earth? |
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Definition
| It is about ¼ the diameter of the Earth and one-eightieth its mass |
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Term
| 12. What is the moon like? |
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Definition
No atmosphere - Extremes of temperature - No water - No life |
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Term
| 13. Why do the moon and sun appear to be about the same size? |
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Definition
| Because the sun is so much farther away |
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Term
| 14. What is the sun made up of? |
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Definition
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Term
| 15. What does the sun look like? |
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Definition
| An average sized yellow star |
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Term
| 16. How large is the sun compared to the Earth? |
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Definition
| About 110 times the diameter of the Earth |
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Term
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Definition
| Approximately 4.6 billion years |
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Term
| 18. What is our solar system’s natural source of heat? |
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Definition
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Term
| 19. Why do the planets and their moons orbit the sun in our solar system? |
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Definition
| The sun exerts a gravitational pull on the planets |
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Term
| 20. How many planets are in our solar system and revolve around the sun? |
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Definition
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Term
| 21. List the planets in the correct order, moving away from the sun. |
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Definition
| Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto |
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Term
| 22. If our nine planets are grouped as inner and outer planets, what position is Earth? |
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Definition
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Term
| 23. How far is the Earth from the sun? |
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Definition
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Term
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Definition
A geologically active planet with a surface that is constantly changing A rocky inner planet |
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Term
| 25. What is Earth’s atmosphere like? |
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Definition
Large amounts of life supporting water Oxygen rich atmosphere |
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Term
| 26. How does Earth’s atmosphere protect Earth? |
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Definition
| It blocks out most of the sun’s damaging rays |
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Term
| 27. Why is Earth different from other planets? |
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Definition
| "It has air, water, soil, and life" |
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Term
| 28. What belief did Ptolemy and Aristotle, early astronomers, have about the solar system? |
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Definition
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Term
| 29. What was the Earth-centered model? |
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Definition
| The sun revolved around Earth |
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Term
| 30. What is the correct model of our solar system? |
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Definition
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Term
| 31. What is the sun-centered model? |
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Definition
| The planets revolve around the sun |
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Term
| 32. Which scientist developed the sun-centered model of the solar system? |
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Definition
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Term
| 33. Which two scientists believed in the sun-centered model? |
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Definition
| Nicolas Copernicus and Galileo Galilei |
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Term
| 34. Who used the first telescope to study the planets and confirm the sun-centered model? |
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Definition
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Term
| 35. What added to our understanding of the moon? |
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Definition
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Term
| 36. What is the name of the first tool that is used for making observations in orbit? |
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Definition
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Term
| 37. Why does our understanding of the sun, moon, and the solar system continue to change? |
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Definition
| New scientific discoveries |
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Term
| 38. Who was the first human to walk on the moon? |
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Definition
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Term
| 39. Why are space shuttles better than earlier space vehicles? |
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Definition
| Space shuttles can be used many times |
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