Across
- 3. Flying insects that are closely related to ants and wasps that pollinate plants so we have food and flowers
- 4. Vertebrate animals that have feathers, wings, and beaks
- 5. A machine that can fly because of the force of air upon its wings; driven by propellers or a jet engine
- 6. Something strong that produces the force, or push, needed to move an object forward, they are used to launch spacecraft
- 7. The only mammals that fly
Down
- 1. A type of aircraft that uses rotating, or spinning, wings called blades to fly
- 2. An aircraft flown with no humans on board
- 4. A large bag filled with hot air or gas to make it rise in the air, typically carrying a basket for passengers