Solar System & Space Exploration

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Across
  1. 1. The force of _______ keeps planets orbiting the sun and moons orbiting the planets. (A)
  2. 3. Sputnik 1 was the first _______ to be sent into space.
  3. 4. A planet orbiting the sun - the definition of a year. (A)
  4. 5. The sun is made mostly of _______.(A)
  5. 9. By sending rovers, such as Opportunity and Curiosity to ____, we have been able to study the Red Planet. (B)
  6. 10. Comets are unique because they have extremely ______ orbits around the sun.(A)
  7. 11. America's moon landing occurred during Project ______ in 1969. (C)
  8. 12. People practiced working and living in space during project ________. (C)
  9. 14. The light visible when a meteoroid hits Earth's atmosphere. (A)
  10. 15. The only star in our solar system (A)
  11. 16. In the Space Program, Project _______ was focused on getting a man into space and bringing him home alive.(C)
Down
  1. 1. Of all the objects in the solar system, the sun has the ___________ gravitational pull. (A)
  2. 2. The __________Space Station allows scientists from different countries to study space. (B)
  3. 4. The reason scientists brought back samples of moon rocks was to conduct _______ to see what they were made of. (B)
  4. 6. A planet spinning on its axis creating day and night. (A)
  5. 7. During the 1980s and 90s, Americans used the ______________ to send crewed missions into space. (B)
  6. 8. A ______ is an unmanned wheeled vehicle used to explore Mars. (B)
  7. 13. Planets orbit stars while _____ orbit planets. (A)