Crossword.

1. (adj)Behaving in a sensible way, like an adult.
5. (adj)Having or showing strong feelings of enthusiasm for something or belief in something.
6. (n)The activity of applying scientific knowledge to the design, building and control of machines, roads, bridges, electrical equipment, etc.
7. (adj)Clear; easily seen.
9. (n)The solid material that settles at the bottom of a liquid.
11. (adj)connected with the relation of plants and living creatures to each other and to their environment.
13. (adj)Most extreme; best, worst, greatest, most important, etc.
14. (adv)Connected with or happening in the mind.
15. (v)To agree to give somebody what they ask for, especially formal or legal permission to do something.

1. (adj)Enjoying playing tricks and annoying people.
2. (n)A possible effect or result of an action or a decision.
3. (adj)Unwilling to obey rules or accept normal standards of behaviour, dress, etc.
4. (adj)Showing that you really mean the opposite of what you are saying; expressing.
8. (v)To develop gradually, especially from a simple to a more complicated form; to develop something in this way.
10. (adj)Said, made or done very quickly, especially when this has bad results.
12. (n)Long life; the fact of lasting a long time.