| 1. The direction of movement of an object is detected by a _________. | |
| a) | radio telescope | b) | refracting telescope | c) | satellite | d) | spectrograph |
| 2. The ________ probes were sent to visit the farthest reaches of the solar system. | |
| a) | Mariner | b) | Voyager | c) | Venera | d) | Viking |
| 3. A reusable craft designed to transport astronaunts and equipment to and from space is a _________. | |
| a) | space probe | b) | space shuttle | c) | satellite | d) | rocket |
| 4. A _______ searches for other intelligent life forms that use radio waves. | |
| a) | radio telescope | b) | refracting telescope | c) | satellite | d) | spectrograph |
| 5. The speed and direction a rocket must attain to escape Earth's gravitational attraction is called _______. | |
| a) | gravity force | b) | escape velocity | c) | launch speed | d) | vertical thrust |
| 6. A reflecting telescope uses a __________. | |
| a) | convex lens | b) | convex mirror | c) | concave mirror | d) | concave lens |
| 7. If a company wanted a satellite to remain over Denver, Colorado, at all times, then the satellite should be put into __________. | |
| a) | polar orbit | b) | geosynchronous orbit | c) | equatorial orbit | d) | North American orbit |
| 8. In a rocket with liquid fuel, ________ are pumped into the burning chamber to be ignited. | |
| a) | oxygen and nitrogen | b) | oxygen and carbon | c) | oxygen and hydrogen | d) | nitrogen and hydrogen |
| 9. A telescope that detects radiation with very long wavelengths is a _________. | |
| a) | refracting telescope | b) | reflecting telescope | c) | radio telescope | d) | X-ray telescope |
| 10. An engine that creates thrust in the opposite direction of escaping burned fuel gases is a ________. | |
| a) | probe | b) | shuttle | c) | rocket | d) | satellit |
| 11. A rocket-launched device designed to gather data from distant regions of the solar system and send it back to Earth is a _________. | |
| a) | space probe | b) | satellite | c) | space shuttle | d) | rocket |
| 12. A ___________ is a telescope that uses a convex lens to bend light rays to form an image. | |
| a) | spectrograph | b) | radio telescope | c) | refracting telescope | d) | reflecting telescope |
| 13. Reaching the moon was a goal of _________. | |
| a) | Project Apollo | b) | Project Gemini | c) | Project Mercury | d) | Project Galileo |
| 14. The first successful probe to travel to another planet was _______. | |
| a) | Skylab | b) | Sputnik 1 | c) | Mariner | d) | Vega 2 |
| 15. The space shuttle has a _________ that can be used to retrieve objects from space. | |
| a) | spectrograph | b) | space probe | c) | satellite | d) | mechanical arm |
| 16. An orbiting lab where astronaunts can live and work is a ________> | |
| a) | space probe | b) | space station | c) | space shuttle | d) | satellite |
| 17. A __________ determines the composition of objects in space. | |
| a) | radio telescope | b) | refracting telescope` | c) | satellite | d) | spectrograph |
| 18. The first spacewalk occurred during __________. | |
| a) | Project Mercury | b) | Project Apollo | c) | Project Gemini | d) | Project Atlas |
| 19. A device that photographs the spectrum of light from objects is a ________. | |
| a) | radio telescopes | b) | refraction grating | c) | spectrograph | d) | reflecting telescope |
| 20. Tools that use visible light from an object to form an image are ________. | |
| a) | radio telescopes | b) | spectrographs | c) | rockets | d) | optical telescopes |
| 21. A satellite in ____________ orbit travels in the same direction and at the same speed as Earth's surface. | |
| a) | geosynchronous | b) | polar | c) | equatorial | d) | lateral |
| 22. A goal of ________ was to orbit a crewed spacecraft around Earth. | |
| a) | Project Mercury | b) | Project Gemini | c) | Project Apollo | d) | Project Viking |
| 23. The escape velocity on the moon is less than on Earth because the ________. | |
| a) | moon has less mass than Earth | b) | moon has a relatively thin atmosphere | c) | sun's radiation has less effect on the moon | d) | moon has no clouds to hinder a rocket's progress |
| 24. A rocket achieves thrust through _______. | |
| a) | a push against the atmosphete made by the exploding fuel | b) | use of electromagnetic radiation in its combustion chamber | c) | the forward reaction to the backward rush of gases | d) | the action-reaction phenomenon of gravity-antigravity propulsion |
| 25. A refracting telescope could be made much larger if it were placed in space because the __________. | |
| a) | telescope's mirror could always be pointed away from the sun | b) | telescope would be outside the influence of the moon's light | c) | telescope's lens would not be distorted by gravity | d) | telescope could pick up radio waves more easily |