Across
- 2. the use of radio waves to track the location, distance, and speed of faraway objects.
- 5. a very large extinct mammal closely related to elephants.
- 7. a person who works in or studies a science.
Down
- 1. a deep, narrow ditch.
- 3. a thick, strong rope made of steel.
- 4. a long, strong piece of wood or metal that supports parts of a building
- 6. a long, large, pointed tooth that sticks out from the mouth of some animals.