B3U4 Reding and Thinking

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