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- 1. Multiple ChoiceThe heavens were studied by ancient astronomers.ActivePassive
- 2. Multiple ChoiceA solar eclipse was predicted by Thales of Miletus in 585 B.C.ActivePassive
- 3. Multiple ChoiceHipparchus established an observatory in the third century B.C.ActivePassive
- 4. Multiple ChoiceA supernova, or exploding star, was recorded by Chinese astronomers in 1054.ActivePassive
- 5. Multiple ChoiceIn 1543, a new theory was suggested by a Polish astronomer, Copernicus.ActivePassive
- 6. Multiple ChoiceIn this theory, Earth and other planets orbited the sun.ActivePassive
- 7. Multiple ChoiceThe use of Copernicus's theory was forbidden by religious leaders until 1757.ActivePassive
- 8. Multiple ChoiceHowever, persons were convinced about Copernicus's theory by the discoveries of other astronomers.ActivePassive
- 9. Multiple ChoiceThe law of universal gravitation was discovered by Sir Isaac Newton.ActivePassive
- 10. Multiple ChoiceThe Copernican theory gained support after this discovery.ActivePassive
- 11. Multiple ChoiceUranus was found by Sir William Hershel in 1781.ActivePassive
- 12. Multiple ChoicePluto was discovered by Clyde William Tombaugh in 1930.ActivePassive
- 13. Multiple ChoiceThe closest planet to the sun, Mercury, orbits the sun in eighty-eight Earth days.ActivePassive
- 14. Multiple ChoiceVenus is called "the Morning Star" by many persons.ActivePassive
- 15. Multiple ChoiceAn American space probe, Mariner II, reached Venus in 1962.ActivePassive
- 16. Multiple ChoiceIt sent back data about conditions on and near Venus.ActivePassive
- 17. Multiple ChoiceThe surface of Venus has been mapped by succeeding American space probes.ActivePassive
- 18. Multiple ChoiceWe call Mars the "Red Planet."ActivePassive
- 19. Multiple ChoiceThis planet was named by ancient Romans after the red god of war in Roman mythology.ActivePassive
- 20. Multiple ChoiceLimonite, a brick-colored mineral, gives Mars its red color.ActivePassive
- 21. Multiple ChoiceMars orbits the sun in about 687 Earth days.ActivePassive
- 22. Multiple ChoiceMars was observed by the U.S. spacecraft Mariner IV in 1965.ActivePassive
- 23. Multiple ChoiceIn 1976, The United States landed Viking I near the planet's equator.ActivePassive
- 24. Multiple ChoicePhotographs of the surface of Mars were sent back to Earth by both Viking I and Viking II.ActivePassive
- 25. Multiple ChoiceThey showed the canyons, deep gorges, and "dry river beds" on the surface of Mars.ActivePassive
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