Fossil Unit Flash Cards

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- How does a fossil form?
- A fossil may form when a dead plant or animal is covered with sediment. A mold forms in sediment. The mold is filled with more sediment resulting in a cast, or impression, of a dead material. Other fossils are hard body parts. Some fossils have body parts repleced by minerals and become petrified.
- Your teacher asks you to find information about the rock cycle in your text book. Where could you quickly locate specific pages on this topic?
- Index
- Imprint
- a footprint or other track of an organism that has been preserved in rock.
- rain water that drains off lands
- runoff
- Physical weathering changes a rock's
- size and shape
- In what part of your science book can you find what chapters specific topics are covered as well as page numbers?
- Table of contents
- The earth's crust is made up of about twenty
- moving plates
- An oragnism can become a fossil if the organism is covered by
- sediment
- When water carries soil, sand, and rock
- erosion
- hollow left in sediment by an organism
- mold
- Petrify means
- to replace molecules in dead organisms with minerals, resulting in the obejct turning to stone.
- fossil formed by sediments filling a mold
- cast
- Cast
- a fossil formed by sediments filling a mold.
- Your teacher asks you to find the meaning of petrified, where could you quickly find the definition?
- Glossary
- The top layer of the earth is the
- crust
- dropping of sediments in another spot
- deposition