1st Semester Review FUN 6th period

Coquina is a rock made of sand and bits of seashells cemented together. What kind of rock is coquina?

• igneous

• magma

• metamorphic

• sedimentary

What are the 3 components of soil?

• insects, sand, topsoil

• topsoil, subsoil, bedrock

• earthworms, sand, silt

• clay, humus, sand

A fossil of a fish was found embedded in a layer of rock that is near the top of a mountain. What might scientists conclude about the history of the area?

• A sea once covered the area.

• A lush forest covered the area.

• A volcano once erupted in the area.

• An earthquake once struck the area.

What happens when energy stored in the Earth's crust is suddenly released?

• mountain

• earthquake

• tornado

• volcano

A boundary where two tectonic plates come together, or collides, is called a

• divergent boundary

• convergent boundary

• transform boundary

• transfer boundary

Earth's core is mainly composed of

• iron and aluminum.

• silicon and hydrogen.

• iron and nickel.

• silicon and oxygen.

Scientists believe the Earth's inner core to be solid. This is probably due to extremes in

• depth.

• density.

• temperature.

• pressure.

Which of the following is an agent of chemical weathering?

• acid rain

• freezing and thawing.

• tree roots growing through roots.

• rocks tumbling down a stream or river

What makes up soil?

• only weathered rock

• only organic rock

• only animals and plants

• weathered rock and organic matter

A drawing of the Ring of Fire is a model that helps scientists predict areas where

• hurricanes are likely to occur.

• volcanoes are likely to occur.

• ocean currents are likely to occur.

• thunderstorms are likely to occur.