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Chapter 8 vocab
science
| Question | Answer |
|---|---|
| Geologist estimate that the Earth is _____ years old. | 4.6 billion |
| The principle that geologic process that occurred in the past ca be explained by the current geologic processes is called _____. | Uniformitariansm |
| Layers of rock, called ____, show the sequence of events that took place in the past. | Strata |
| Even though all three classes of rock can form layers, the ones most commonly studied are _____. | Sedimentary |
| The boundary between two beds of rock is called a ______. | Beding plane |
| The principle that a sedimentary rock layer is older than the one above it is called the law of _____. | Superstition |
| The principle that a fault or intrusion is younger than the layers it cuts through is called the law of ______ _____. | Crosscutting Relationships |
| The absolute age of a rock layer is its ______ age. | Numeric |
| Using the rate of _____ to determine absolute age would be less accurate fir a surface feature such as the Grand Canyon which is millions of years old. | Erosion |
| In general, about 30 cm of sedimentary rock are _______ over a period of 1,000 years. | Deposited |
| Some sedimentary rock layers show annual layers called _____. | Varves |
| Which layer (summer or winter) is composed of darker, fine grains. |
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