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Let's Evaluate Directions: Choose the letter that corresponds to the correct answer. Write your answer on your answer sheet.
1. How can you differentiate a comet from an asteroid? A. Comets orbit planets and most asteroids orbit the Sun. B. Comets are hot balls of gas and asteroids are made mostly of ice. C. Comets are made mostly of ice and asteroids are made mostly of rocks. D. Comets form constellations in the sky and asteroids form fireballs in the sky.
2. What do we call these objects from space that enter Earth's atmosphere and are commonly called "shooting stars"? A. Comets C. Meteors B. Asteroids D. Meteorite
3. What do we call when an object strikes the surface of a planet or moon, and they leave a deep impression on its surface? A. Canyon C. Pothole B. Crater D. Sinkhole
4. Which of the two properties of an impacting object have the greatest effect on the amount of energy released by the impact? A. Mass and Diameter B. Diameter and Density C. Impact angle and Density D. Mass and Impact Velocity
5. What are the two most abundant elements in the Earth's crust and are also the main composition of asteroids? A. Oxygen and Silicon B. Hydrogen and Nitrogen 19 C. Iron and Nickel D. Helium and Silver
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