unit 5 test review

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Across
  1. 1. Very cold.
  2. 6. To try to catch or follow something, or to work toward a goal.
  3. 7. A small flowing body of water.
  4. 9. A huge group of stars, planets, and space dust held together by gravity.
  5. 10. The science of flying airplanes and spacecraft.
  6. 11. Ways something is used in real life.
  7. 12. A very sad event that causes great loss or suffering.
Down
  1. 2. The force that pulls objects toward each other, like Earth pulling us to the ground.
  2. 3. The work of designing and building things like machines, bridges, or technology.
  3. 4. A place where scientists study the sky, stars, and planets.
  4. 5. People who leave their homes to stay safe from danger or hardship.
  5. 8. An object that moves around a planet, like the Moon around Earth.