| A | B |
|---|
| sanctuary | safe place for endangered animals |
| endangered | in danger of becoming extinct |
| pollution | substances that make the air, water, or land dirty |
| conservation | study to protect the Earth's natural resources |
| natural resource | items made by the Earth, such as oil, air, or water |
| remain | to stay for many years; or is left behind |
| trouble | a problem |
| extinct | no longer existing on Earth |
| hardest | the most difficult |
| prairie | large flat area covered with grasses |
| planet | mass of gas, rock, or land rotating around sun in space |
| recyle | to use again |
| litter | trash left behind |
| Some jobs are ___ to finish than others. | easier |
| Sally is ____ than Tom. | smaller |
| Of all the children, Alex is the _________. | tallest |
| Fred is very ___. | tall |
| recycling center | place where you can take cans, glass, paper, and metal to be used again |
| Two days we ___ to the movies. | went |
| Last month we ____ a polar bear at the zoo. | saw |
| Yesterday Mary ____ she had gone to school eary. | said |
| Dear Uncle Bill | incorrect greeting of letter |
| Dear Mom and Dad, | correct greeting of letter |
| food | what we eat to stay alive |
| foot | bottom part of our leg |
| fool | silly person |
| wood | tree part we use for fire |
| I ___ like to see you more often. | would |
| worm | an invertebrate that crawls |
| wool | material made from sheep |
| brook | stream or creek |
| boot | high shoes worn in snow |
