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Clues from the Past
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| Using Clues |
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| | Long ago, many living things left imprints. |
| | A footprint is a kind of imprint. |
| | Imprints and the remains of things that lived long ago are called fossils. |
| | Fossils are clues to the plants and animals that lived in the past. |
| | Scientists use clues to find out about plants and animals that lived long ago. |
| | Infer means to use what you know to figure something out. |
| | You can infer what made imprints after carefully observing them. |
| | Fossils were formed long ago. |
| | Over time, a dead animal or plant was covered by sand and its soft parts rotted away. |
| | After a long time, the remains of the animal or plant changed to rock and became a fossil. |
