Engineering Design

2. Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.
8. limitation or restriction
9. A means of solving a problem or dealing with a difficult situation
11. consistency of measurement
12. Reservoir A place where carbon is stored.
14. A mixture of gases that surrounds a planet or moon.
15. Cycle The organic circulation of carbon from the atmosphere into organisms and back again
16. Consists of all life on Earth and all parts of the Earth in which life exists, including land, water, and the atmosphere.
17. how good or bad something is
19. A measure of the relationship In which one variable directly influences a second.
23. the rigid outer part of the earth, consisting of the crust and upper mantle.
24. Overall weather in an area over a long period of time

1. increase in the concentration of acid
3. All the water at and near the surface of the earth
4. gases in the atmosphere that trap energy and warm the Earth
5. One variable that is changing at the same time as another.
6. a principle or standard by which something may be judged or decided
7. amount
10. A substance in the environment that is useful to people.
13. pertaining to a sense of beauty or art
18. Sink A natural environment that absorbs and stores more carbon dioxide from the atmosphere than it releases
20. A scientific process that involves the systematic and careful collection of data.
21. the solid part of the earth consisting of the crust and outer mantle
22. an alternative that we sacrifice when we make a decision