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04/14 actionmag
vocabulary words
| Term | Definition |
|---|---|
| sickle-cell anemia | a disease that causes red-blood cells to curve |
| bone marrow | substance found in the bone |
| transplant | when an organ is replaced |
| donate | to give |
| grueling | demanding and tiring |
| fossils | remains of plants and animals that have been preserved in rock |
| Ice Age | long ago when the Earth was frozen |
| excavation | to dig up an area to for a buried thing |
| minerals | substance found in the Earth that is not manmade |
| theories | ones idea about somehting without proof |