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Lesson 3
Lesson 4
Lesson 5
Vocabulary
Critical Thinking
100
A measure of the energy released during an earthquake.
What is magnitude.
100
The rocks and sand that collect in a jumble as a glacier melts.
What is till.
100
A rock's age compared to other rock layers.
What is relative age.
100
A mixture of weathered rock, air, water, living things, and humus.
What is soil.
100
Describe how an earthquake starts and travels.
Typically, an earthquake begins at a plate boundary. Two plates may get stuck as they try to move past each other. Over time, energy gets built up and eventually the plates move. When this happens, the energy is released. The point underground where this happens is called the focus. Directly above the focus, on Earth's surface, is the epicenter. The earthquake travels in seismic waves. There are 2 main types of waves: body waves and surface waves.
200
The location on Earth's surface above the focus of an earthquake.
What is epicenter.
200
The part of soil that is made of decayed animals and plants.
What is humus.
200
The remains, traces, or imprints of living things preserved in Earth's crust.
What is fossils.
200
A ridge or mound that contains the till that's left after a glacier melts.
What is a moraine.
200
Explain the difference between the 2 scales for measuring earthquakes.
The Richter Scale measures the magnitude of the earthquake. The Mercalli Scale measures the damage that occurs because of the earthquake.
300
A break or a crack in the rock of the lithosphere along which movements take place.
What is a fault.
300
What are the 2 main agents of erosion?
What is wind and water.
300
The time it takes for half the mass of the original element to change into the decay product.
What is half-life.
300
Loose pieces of minerals, rock, and organic material that are eroded and deposited.
What is sediment.
300
Why would mass wasting happen faster on a slope than on flat ground?
Mass wasting in erosion caused by gravity. On a slope, gravity would have more of an effect on the sediment. It would be able to fall down the slope more than it would on flat land.
400
A vibration that travels through Earth and is produced by an earthquake or volcanic eruption.
What is seismic waves.
400
What do we call erosion that is caused by gravity?
What is mass wasting.
400
History is measured in long stretches of time called eras. Each era is split into shorter amounts of time called ________.
What are periods.
400
The breaking down of rock by changes in it's chemical composition.
What is chemical weathering.
400
After the 1st half-life of an element, how much of that element would be left?
What is 1/2.
500
What are the names of the 2 scales used to measure earthquakes?
What is Richter and Mercalli.
500
T or F: Weathering agents can only be nonliving(abiotic).
What is False.
500
A rock's age in years. Radioactive decay is used to figure this out.
What is absolute age.
500
Smaller earthquakes that come after the main earthquake.
What are aftershocks.
500

1. Give 3 forces that build our land. 2. Give 3 forces that shape our land.

1. tension, compression, shearing, earthquakes, volcanoes 2. weathering, erosion, deposition, moving water ur mom