Rock Layers (Geologic Time)

Front

What are evidence of past life?

Back

Fossils

Front

What is it called when sediment is moved around by wind or water?

Back

Erosion

Front

What do paleontologists study?

Back

Fossils

Front

How many years does the geologic time scale represent in Earth's history?

Back

4.6 billion years

Front

What type of rock is made from sediment compacted by the weight of sediment layers above?

Back

Sedimentary rock

Front

What is the process of breaking down rocks into smaller pieces called?

Back

Weathering

Front

What are the three main types of rocks?

Back

Igneous, Sedimentary, Metamorphic

Front

What is the term for the study of Earth's physical structure and substance?

Back

Geology

Front

What is the name of the layer of Earth that is made up of solid rock?

Back

Lithosphere

Front

What is the term for the gradual movement of tectonic plates?

Back

Plate tectonics