Knowledge 7 Review

Characteristics: Characteristics of rocks include....

Varies: If something varies it....

The earth only has two layers: the crust and the core.

Rocks can be put into three groups: igneous, sedimentary, and metamorphic.

Crust: The earth's crust is a liquid layer of rock inside the earth.

A volcano is caused by an eruption of magma making its way to the surface of Earth.

Geologist: A geologist studies clouds.

Inner Core: The inner core is a solid metal ball in the center of the earth.

The earth's surface is covered by continents and oceans.

We know dinosaurs lived on Earth because of fossils that have been found.

Pressure: Pressure happens when the weight of something pushes against something else.

A geyser is an eruption of lava.

The earth is shaped like a...

Scientists have studied rocks and fossils, helping us learn more about Earth's history.

Surface: The surface of earth is a liquid rock.

Solid: If something is solid, it changes shapes.

Salt is an important mineral used by people.

Destructive: Volcanoes can be destructive when their lava and ash pour onto the land.

Preserved: If you preserve something, you....

The equator is an imaginary line that runs from the North Pole to the South Pole.

Mantle: The mantle is the outmost layer of the earth.

We live in the core of the earth.

Heat, pressure, and time cause many changes inside the earth.

Fossils: Fossils are preserved imprints of animals and plants that died many years ago.

Layer: When it is cold outside, we wear more than one layer to keep warm.

Extinct: If an animal is extinct, that means there are no more left on earth.

Fossils are pieces of rock that came from a geyser.

Sediments: Layers of sediments, or pieces of dirt and rock, over time form sedimentary rocks.