410 likes | 518 Views
Test Review. Test on Thursday!!!!. The most powerful Mechanical weathering force is frost wedging . Sheeting is also known as exfoliation . Carbonic acid is the most powerful chemical weathering agent. Water moving sediments (broken down pieces of rock) downhill is called erosion. .
E N D
Test Review Test on Thursday!!!!
The most powerful Mechanical weathering force is frost wedging.
Carbonic acid is the most powerful chemical weathering agent.
Water moving sediments (broken down pieces of rock) downhill is called erosion.
Absolute dating is accomplished by analyzing the amounts of different radioactive isotopes in a sample. This gives and exact age.
Relative dating looks at rocks around the target rock and determines the age based on fossil content and other clues like position.
Superposition tells us that in an undisturbed state, rocks below are older and rocks above are younger.
Cross cutting relationships (for faults and dikes) are best described by the statement, “You can’t cross the street before its built.”
Original Horizontality tells us that sedimentary and igneous rocks that form at the surface for horizontally.
Correlation is the locating of matching rock beds either by their position (if they are close enough to be seen) or by fossil content (if they are not near each other).
Approximately 88 percent of the history of the Earth occurred in Pre-Cambrian time. The few life forms that existed left little to no fossil evidence.
Life began to leave evidence (fossils) behind at the start of the Phanerozoic Era.
Hadean Eon is named after the “Hell-like” conditions on the surface of the Earth after it first formed.
Eons are the largest of the divisions of the history of the Earth.
We are not sure of the exact cause of the extinction that occurred between the Paleozoic and Mesozoic Eras.
We are certain that a comet or asteroid about the size of Mount Everest collided with the Earth near the Yucatan Peninsula about 66 million years ago.
This event caused the extinction event that ended the Mesozoic and started the Cenozoic.
What period did the most of the coal beds in the Northeastern part of the United States get put in place? (they also combined to be called what?)
Give a few theories on how we think the Paleozoic Era ended.
How were the continents arranged at the beginning of the Mesozoic?
Which animal group is most associated with the Cenozoic Era?
Flowering plants (angiosperms) are most associated with the Cenozoic Era.
Cenozoic Era mountain ranges • Alps, Himalayas, and Rockies
Be able to identify the different types of weathering • Mechanical- Biological • Mechanical- Frost Wedging • Mechanical- Sheeting • Mechanical- Thermal Expansion • Chemical