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2. The act of leaving a place.
5. Difficult gymnastics.
7. name given to a product or service.
9. The mass of air surrounding the Earth.
10. The part of a picture behind the main things.
12. The lowest part of anything.
14. The protection of the natural environment.
16. pressure The pressure that is exerted by the atmosphere.
17. Someone who does a sport or activity for fun, not as a job.
18. an organ that has the shape of a bag in which liquid waste (= urine) collects before it is passed out of the body.

1. The way a person or animal does things.
3. Moving pictures made from graphics or models, not from filming real actors.
4. A major biotic community characterized by the dominant forms of plant life and the prevailing climate.
6. To make a hole or a tunnel in the ground by digging.
8. The people watching or listening to something such as a play, film or concert.
11. Blood vessels that carry blood from the heart to the body.
13. a possibility of something happening, especially something that you want.
14. An organization for helping people in need.
15. An act of coming or being brought to a place.