B3U4 Reding and Thinking

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Across
  1. 4. (v.) to move around a large object in space such as a planet
  2. 5. human
  3. 6. an object that is sent into space to travel around the Earth in order to receive and send information
  4. 9. to control what something will be
  5. 12. a person trained to travel in a space
  6. 14. an administrative(行政的) unit of government
  7. 15. expect and wish
  8. 16. (n.)any communication that encodes(加密) a message
Down
  1. 1. free from external control and constraint
  2. 2. the plural(复数) of datum
  3. 3. a vehicle shaped like a tube(管子)that travels in space
  4. 5. a machine that you travel in or on, especially one with an engine that travels on roads, for example a car, bus.
  5. 7. to send a space vehicle, satellite, or other object into the air or into space
  6. 8. (adj.)you are sad because something has not happened or because something is not as good as you had hoped
  7. 10. the force that makes any two objects that have mass move toward each other. The most common example of this is when an object falls to the ground
  8. 11. the whole of space and all the stars,planets,and other forms of matter and energy in it
  9. 13. a border between two countries