3. Ammonia

2. very serious and having an important bad effect in the future
4. to come or bring something back to life, health, existence, or use
5. the quality of having two poles
7. to smell something by taking air in through your nose
8. bad or very unpleasant
9. large or noticeable enough to have an important effect.
10. a solid object with a square base and four triangular sides that form a point at the top
11. a useful or valuable quality, skill, or person
12. a state of balance
14. the area of mathematics relating to the study of space
15. a smell, often one that is unpleasant
16. a child of a person's aunt or uncle

1. the quality of being able to be dissolved
3. a solid with four surfaces are triangles
5. move into or through something
6. a mixing or blending process of producing a product
9. solution containing water
11. NH4+ ion
13. a natural or chemical substance that is spread on the land or given to plants, to make plants grow well
16. something that makes a chemical reaction happen more quickly without itself being changed