Space Race

2. small quantity of a thing / material used for science
4. belonging to a different country, race, or group
5. a person who is trained for travelling in a spacecraft.
7. a colourless gas that exists in large quantities in the air. All plants and animals need it.
10. between the stars
13. dishonest or immoral behaviour, especially when you think it is amusing or interesting.
14. the layer of air or other gases around it.
17. it consists of very small particles of a radioactive substance.
18. part that produces the power which makes a vehicle move.
19. holes areas in space where gravity is so strong that nothing, not even light, can escape from them.

1. an important event in the history or development of something or someone.
2. walk exiting a spacecraft
3. not feel the pull of gravity
6. revolve around a planet
8. an extremely large group of stars and planets that extends over many billions of light years.
9. is a person who uses scientific knowledge to design, construct, and maintain engines and machines or structures such as roads, railways, and bridges.
11. a colourless element that has no smell and is usually found as a gas. It forms about 78% of the earth's atmosphere, and is found in all living things.
12. act of bringing an aircraft or spacecraft down to the ground.
15. vertical structure to send rockets into space
16. a small remote-controlled vehicle which roams over rough, esp extraterrestrial, terrain taking photographs, gathering rock and soil samples, etc