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Unit 3 Science
Study guide questions
| Question | Answer |
|---|---|
| What is the name of the scale used to organize Earth’s history? | Geological time scale |
| What method is used by scientists to find the EXACT age of a fossil? Carbon dating is an example of this? | Absolute dating |
| Rock layers are generally found with the oldest layers at the bottom and the youngest layers at the top. This is called the Law of: | The law superposition |
| Rock layers and _____________ are used in the process of relative dating to make conclusions about an area’s distant past. | Index fossils |
| Missouri has many fossils that were once water creatures. What does this tell us about the geology of Missouri in the past? | Missouri could have been covered in shallow sea. |
| Most life forms appear______________(closer, farther) from human history. | closer |
| What is an example of a trace fossil? | Footprint, animal borrow, dropping fossils |
| What is an index fossil ? | Fossil that lived for a short period of time and helps find the age of rock layers. |
| Most fossils are found in _________________ rock. | sedimentary |
| Fossils found in tree sap are also known as fossils in: | amber |
| The appearance of water on Earth by the vapor from volcanoes led to what? | The first life form appeared |
| If organisms such as fish and marine reptiles are found in an area and then fossils of rabbits and deer-like animals are found in same location, what does this say about the fossil record? | The area was once covered by an ocean and then by land |
| Faults and magma are ___________(younger or older?) than the rock layers they cross. | younger |
| Calculating the age of rocks, minerals and fossils that contain certain radioactive isotopes is called … | Radiometric dating |
| When rock layers are matched with similar rock layers from another region, the ________________________is constructed. | Geological column |
| Which type of fossil is a fossil in which minerals replace all or part of the organism? | petrification |
| This type of fossil is an extremely thin coating of carbon on rock that forms when materials that make up an organism become gasses and escape, leaving only carbon behind. | Carbon film` |
| A hollow area in sediment in the shape of an organism or part of an organism is known as what kind of fossil? | A mold |
| Scientists who study fossils are called: | paleontologist |
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