Across
- 3. These compounds are made up mostly of wáter.
- 5. is obtained from the polymerization of carbón.
- 6. that allows to characterize something.
- 7. They consist of one or more elements.
- 8. two atoms of hydrogen and one of oxygen form it.
- 9. fat insoluble in water.
Down
- 1. destroys pests of plants and animals.
- 2. Very small microorganism.
- 4. oxygen present in a body of wáter.
- 5. alteration to the environment.