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1. Stars begin their lives composed primarily of: a. propane b molten rock 2. Which term best represents the brightness of a celestial object as measured ed from Earth? a. Gravitational Force b. Light Year C. Absolute Magnitude (C) Apparent Magnitude d. uranium. 3. The reaction that produces energy in the sun is called? a. Nuclear Fission b. Nuclear Fusion C. Photosynthesis d. Friction 4. Which of the following statements is correct when referring to retrograde motion: a. It occurs because Earth travels faster around the sun than the outer planets b. Apparent motion shows a planet moving from east to west C. From Earth we can see retrograde motion of all of the planets in our solar system d. Both A and B are correct C. hydrogen. aved fon zsob Ism2001 ticho zhini ai smit

Question

1. Stars begin their lives composed primarily of: a. propane b molten rock 2. Which term best represents the brightness of a celestial object as measured ed from Earth? a. Gravitational Force b. Light Year C. Absolute Magnitude (C) Apparent Magnitude d. uranium. 3. The reaction that produces energy in the sun is called? a. Nuclear Fission b. Nuclear Fusion C. Photosynthesis d. Friction 4. Which of the following statements is correct when referring to retrograde motion: a. It occurs because Earth travels faster around the sun than the outer planets b. Apparent motion shows a planet moving from east to west C. From Earth we can see retrograde motion of all of the planets in our solar system d. Both A and B are correct C. hydrogen. aved fon zsob Ism2001 ticho zhini ai smit

1. Stars begin their lives composed primarily of: a. propane b molten rock 2. Which term best represents the brightness of a celestial object as measured ed from Earth? a. Gravitational Force b. Light Year C. Absolute Magnitude (C) Apparent Magnitude d. uranium. 3. The reaction that produces energy in the sun is called? a. Nuclear Fission b. Nuclear Fusion C. Photosynthesis d. Friction 4. Which of the following statements is correct when referring to retrograde motion: a. It occurs because Earth travels faster around the sun than the outer planets b. Apparent motion shows a planet moving from east to west C. From Earth we can see retrograde motion of all of the planets in our solar system d. Both A and B are correct C. hydrogen. aved fon zsob Ism2001 ticho zhini ai smit

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Answer

1. Stars begin their lives composed primarily of **C. hydrogen**.<br /><br />2. **C. Apparent Magnitude** represents the brightness of a celestial object as measured from Earth.<br /><br />3. The reaction that produces energy in the sun is called **B. Nuclear Fusion**.<br /><br />4. The correct statement referring to retrograde motion is **D. Both A and B are correct**. Retrograde motion occurs because Earth travels faster around the sun than the outer planets, and this difference in speed makes the outer planets *appear* to move backward (from east to west) from our perspective on Earth.<br />
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