Science Monthly Review

2. (v.) to use something again
5. (n.): when land quickly becomes covered with deep water
6. (n.) what different things are made up with
7. (n.) something that can harm air, land, soil or water
8. (v.) to use old materials to make new things
12. (n.): something that happens quickly and can harm or destroy large areas
13. (n.): when there is no rain or water in a place for a long time
14. (n.): the number of one kind of living thing in a habitat
15. (adj.) not a lot

1. (v. ) to use less of something
2. (n.) something from Earth that living things use
3. (n.) when different people, plants or animals all try to get the same thing
4. (v.) to cause pollution
9. (n.): all of the different living things in a habitat
10. (adj.): when there are not a lot of one kind of plant or animal alive on Earth
11. (adj.) anything that is not built or put there by humans
16. (v.): when a large group of animals moves to a new area