Layers
Plates
Soil
Terms
Land
100

The thinnest of earth's layers.

What is the crust?

100

Boundaries that slide past each other. 

What are transform boundaries?

100

The layer of soil that contains the most minerals and humus.

What is topsoil?

100

Melted rock on the earth's surface.

What is lava?

100

Land formation formed by divergent plates.

What are volcanoes?

200

The hottest of earth's layers.

What is the inner core?

200

The study of how the earth's lithospheric plates interact.

What is plate tectonics?

200

The lowest layer of the crust which is made of solid rock.

What is bedrock?

200

Melted rock inside the earth.

What is magma?

200

Weathering that occurs when water freezes and thaws in cracks in rocks, breaking them into smaller pieces.

What is physical weathering?

300

The thickest of earth's layers.

What is the mantle?

300

Plate boundaries that push together to form mountains.

What are convergent boundaries?

300

Horizontal layers of soil.

What is strata?

300

A crack in the earth's crust along which plate movement occurs.

What is a fault?

300

Land formations formed by transform boundaries.

What is a fault?

400

The two layers that make up the lithosphere.

What are the crust and the upper mantle?

400

Plate boundaries that pull away from one another.

What are divergent boundaries?

400

Layer of soil that is light brown in color because it is less rich in minerals and humus.

What is subsoil?

400

The process by which rocks are gradually broken down.

What is weathering?

400

Occurs when stalactites and stalagmites are formed.

What is chemical weathering? 

500

The layer that produces the earth's magnetic field.

What is the outer core

500

Occurs when hot magma rises up toward the crust and cooler magma sinks toward the core.

What are convection currents?

500
Made up of decayed plant and animal matter.

What is humus?

500

An Earth Science principle that states that the earth's atmosphere is constantly moving toward a state of rest or balance.

What is equilibrium? 

500

Precipitation, the amount of oxygen in the atmosphere, and the temperature of the air have all been affected worldwide due to ______________________.

What is deforestation?

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