Changes Over Time

This concept explains why South America and Africa look like two pieces of a jigsaw puzzle.

• weathering

• continental drift

• hydrosphere

• fault

New crust forms on the ocean floor as a result of

• continental drift

• weathering

• seafloor spreading

• relative age

This includes the earth's crust.

• fault

• lithosphere

• relative age

• hydrosphere

This is where there is a break or crack that can cause tectonic plates to move there.

• weathering

• vent

• erosion

• fault

This process occurs when wind and water transport particles such as soil.

• erosion

• vent

• relative age

• fault

Scientists compare the age of one rock to the age of another rock to determine its

• era

• absolute age

• relative age

• chronological age

A volcano erupts when molten rock flows through a central opening, which is called a

• crater

• vent

• fault

• era

The oceans are part of Earth's

• weathering

• lithosphere

• absolute age

• hydrosphere

The process when rock breaks down into smaller pieces is called

• weathering

• lithosphere

• fault

• relative age

The age of rock in years is called its

• absolute age

• relative age

• chronological age

• approximate age