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| Name ________________________ | Date ____________________ |
Directions: In each space below, write in the word that matches the definition below it.
| 1) ______________________________ This is the third planet from the sun. 2) ______________________________ The large body of saltwater that covers about 70% of the earth's surface. 3) ______________________________ The apparent rise in the earth's temperature that scientists believe is caused by an increase in the amount of carbon dioxide and other gases in the air. 4) ______________________________ A physical agency caused by the movement of electrons, protons, manifesting itself as attraction, replusion, magnetic, luminous, and heating effects. 5) ______________________________ An efficient type of light bulb. 6) ______________________________ The disappearance of forests due to land development, cultivation, or lumbering. 7) ______________________________ This ecosystem is hot and humid all year round. Chameleons, toucans, and chimpanzees all live here. 8) ______________________________ Power derived from the fall of water from a higher to a lower level, and extracted by means of waterwheels or hydraulic turbines 9) ______________________________ Any useless material that is thrown away. 10) ______________________________ A layer in the atmosphere which blocks many of the sun's ultraviolet rays from reaching the earth. 11) ______________________________ A person who helps or offers to do something without getting paid. 12) ______________________________ Potentially dangerous to human beings or the environment 13) ______________________________ A type of fuel formed from the remains of plants or sea creatures millions of years ago. 14) ______________________________ To throw garbage on the ground instead of in a garbage can. 15) ______________________________ Performing or functioning in the least wasteful manner possible. |
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