ELT crossword

5. a person who purchases goods and services for personal use.
7. method a method of procedure that has characterized consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
11. the action or process of precipitating a substance from a solution.
13. organisms that make their own food
14. Energy radiation from the Sun capable of producing heat, causing chemical reactions, or generating
15. the process by which businesses or other organizations develop international influence or start operating on an international scale.

1. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
2. resource include coal, natural gas, oil, and nuclear energy
3. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
4. a group of people living in the same place or having a particular characteristic in common.
6. the ability to be maintained at a certain rate or level.
8. the process of turning from liquid into vapor
9. a rising of seawater, magma, or other liquid
10. is the strength and vitality required for sustained physical or mental activity.
12. cycle processes that create and transform the types of rocks