1. Which of the following is a terrestrial planet? A. Neptune C.Earth D. Jupiter B. Uranus 2. Which is the hottest planet in our solar system? A. Mercury C. Mars B.Venus D. Jupiter 3. Why do planets have different periods of revolution around the Sun? A. Some of them have no atmosphere. C. They have different distances from the Sun. B. They differ in sizes and color. D. They have the same number of moons and rings. 4. Which planets are correctly grouped and classified? A. Jupiter, Mars, Neptune, Uranus C. Mercury, Mars, Earth, Jupiter B. Jupiter, Saturn, Uranus, Mercury D. Mercury, Venus, Earth, Mars 5. Which is the only planet that can sustain life? A. Earth C. Mars B. Jupiter D. Venus 6. Why is Mars called a" red planet" ?The presence of_ A. hydrogen in the atmosphere. C. oxygen in the atmosphere. B. iron on its surface. D. rocks and metals in the core of the planet. 7. What is the mostringed planet? A. Neptune C. Saturn B. Jupiter D. Venus 8. Which is considered as the brightest object in the sky next to the moon? A. Neptune C. Saturn B. Jupiter D. Venus 9. Why is earth called a blue planet? It is because of the A. presence of oxygen in the atmosphere. C. sunlight B. abundance of water D. distance 10. Which planet was first discovered by a telescope? A. Neptune C. Saturn B. Jupiter D. Uranus 11. Mercury, Venus, Earth, and Mars are called A. Jovian Planets C. Inner Planets B.Outer Planets D. Gas Giants 12. What do we call Jupiter, Saturn, Uranus, and Neptune? A. Gas Giants C.Outer Planets B. Inner Planets D. Terrestrial Planets 13. Which planet is closest to the Sun? A. Mars C. Neptune B. Mercury D. Venus 14. Why do we need to study the movement of the planets? A. To knowthe characteristic of each planet B. To use it for commercial purpose C.To find out how other planets work so we can predict the future of our planet and so the future of humanity D. None of the above. 15. Why is it important to know the movement of the planet? A. It is helpful in doing assignments. B. It helps us gain a greater appreciation on God' screation of Earth. C. It will give us wisdom on predicting other future and our horoscope. D.None of the above​