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Download 1 PS 3.9 Grade 9 Review
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Grade 9 Astronomy Test Review Concepts and terms to review: □ astronomy □ celestial objects □ luminosity □ sun □ moon □ planet □ star □ asteroid □ comet □ gas giant □ solar system □ nuclear fusion □ astronomical unit (AU) □ light-year □ supernova □ nebula □ □ □ □ □ □ □ □ □ □ □ □ □ □ black hole constellation rotation revolution orbit satellite moon phases retrograde motion atmosphere heliocentric geocentric parts of the Sun electromagnetic spectrum (light, infrared, UV, etc…) meteorite □ □ □ □ □ □ □ □ □ □ □ □ □ □ Doppler effect solar eclipse lunar eclipse risks of space travel benefits of space travel technology in space types of galaxies neutron star big bang theory galaxy dwarf star hydrogen & helium aurora borealis solar wind Answer the following questions: 1. Define the term non-luminous and give an example of a non-luminous object in our solar system. 2. Explain the difference between the terms rotation and revolution. 3. What determines the seasons and day length on Earth? 4. STATE 3 observations that ancient peoples made to discern that the Earth is not flat. __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ 5. How many planets are there? Name them in order. Write down a sentence that helps you remember the order of the planets. 6. Why is the Earth the best planet to sustain living things? 7. Which planet is no longer really considered a planet? Why? 8. Label the sun and explain the importance of the core. 9. What are the two most common elements on the Sun? _________________________ and ________________________ 10. Draw and explain the difference between a lunar and solar eclipse. 11. What is nuclear fusion? 12. What is a galaxy? 13. Describe 4 galaxy shapes. __________________________________ __________________________________ __________________________________ __________________________________ 14. What is the Doppler Effect? 15. Choose one planet and name three similarities and three differences between it and Earth. Similarities Differences 16. Our solar system was formed from a ______________________. 17. What is the difference between Heliocentric and Geocentric model of our solar system?