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Unit C, Ch. 2, Lesso
Unit C, Ch. 2, Lesson 1-2
| Question | Answer |
|---|---|
| Mold | imprint left by the outside of a plant or animal |
| cast | minerals that fill a mold and have the same shape as the original living thing |
| trace fossils | fossils that show how long-dead animals changed their environments |
| A tree buried in a mineral hot springs would probably form a _______. | petrified fossil |
| An example of a trace fossil is a _________. | footprint |
| The part of an animal that is the most likely to make a fossil is ________. | bones |
| By studying fossils of an __________, scientists can find out what the animal might have eaten. | animal's droppings |
| The layer of rock that is the oldest is the ___________. | bottom layer |
| A mold forms when the remains of a dead plant or animal are _________________________. | washed out of rock by water |
| Heat and pressure may destroy most of the buried remains of a plant or animal, leaving a thin covering called _______________. | carbon film |
| When minerals take the take the place of once-living materials, ___________ are formed. | petrified fossils |
| You would find the youngest fossil in the ___________of sedimentary rock. | top layer |
| You would find the oldest fossil in the ____________ of sedimentary rock. | bottom layer |
| How were whole plants or animals preserved as fossils? | They were trapped and preserved in tree sap, glacier, or tar pits. |
| List some examples of trace fossils. | Tracks, burrows, droppings, worm holes, and gizzard stones |
| Why do scientists study fossils? | Scientists study fossils to find out more about what the Earth was like in the past and to find out more about plants and animals that have died out. |
| The crab shell is buried in sediments. The sediments get pressed and squeezed into stone. Meanwhile, the crab shell gets washed away, leaving a hollow space the shape of the crab shell. What kind of fossil is this? | Mold |
| An insect is trapped in the sap of an evergreen tree. The tree sap hardens to form a clear, yellow material. The entire body of the insect is preserved. What is the material that holds the fossil called? | amber |
| Leaf is buried in sediments.The sediments are exposed to high heat and pressure. As this happens, most of the chemicals in the leaf evaporated. The only thing that remains is a thin black film that is in the shape of the leaf.What is this kind of fossil? | carbon film |
| A tree trunk is buried in sediments. Minerals slowly take the place of the materials that formed the tree trunk. Even the structures of the cells are preserved. What do we call a fossil that forms in this way. | petrified fossil |
| Fossil footprints of an extinct kind of elephant are preserved in rock. Tracks a snake made in sand are preserved in another kind of rock. What do we call these kinds of fossils? | trace fossils |
| A hollow space was left where a bone belonging to an ancient bird had been buried. Minerals filled in the hollow space. What do we call fossil that forms this way? | cast |
| fossils | remains of once-living things that have been preserved |
Created by:
svlincoln
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