Future travel

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Across
  1. 3. it is like a skateboard, but it doesn’t have wheels.
  2. 4. this is very big, and it goes much higher than a plane.
  3. 5. travels very quickly from city to city.
  4. 6. when you put this on your back you fly in the air.
Down
  1. 1. it is a long train, but it usually travels on one rail.
  2. 2. jet this is one of the fastest planes in the world.
  3. 3. train this is very long, and