Across
- 2. special sound waves used in such processes as examining organs inside the body and directing the route of submarines
- 6. to control something, usually in order to use its power
- 7. a device used in a vehicle to tell you how to get to a place
- 8. using artificial materials and methods to produce activity or movement in a person or animal
Down
- 1. made from artificial substances, often copying a natural product
- 3. one of the long, thin parts like arms of some sea animals, used for feeling and holding things, catching food, or movin
- 4. a liquid in which solids will dissolve
- 5. to make something happen