Rocks/Weathering/Soil

Which type of rock is formed because of high heat and pressure without melting?

• igneous

• instrusive

• sedimentary

• metamorphic

What is one way sedimentary rocks are formed?

• they are formed from cooled magma

• they are formed from tiny pieces of rock collected in ocean beds

• they are formed over many years of pressure and heat within Earth

• they are hot magma the moment it is expelled from a volcano

Soil is a complex mixture of

• minerals

• humus

• air and water

• all of the above

Soil that drains slowly most likely has a high amount of

• clay

• silt

• gravel

• sand

A plant that needs well drained soil would grow best in soil made mostly of

• silt

• clay

• sand

• humus

Which best describes one way igneous rocks form?

• sedimentary rocks erode

• sedimentary rocks are compacted

• metamorphic rocks melt, then cool

• metamorphic rocks are deposited and cemented

Which of these human activities most relies on high-quality soil?

• hiking

• hunting

• coal mining

• growing crops

While digging, a person found that most of the rocks were igneous rocks. What can be concluded?

• the rocks were probably carried there by ancient people

• a volcano was nearby one time

• the area was once covered by an ocean

• a glacier passed through at one time

Soil with approximately equal parts of sand, clay and silt is called ________.

• loam

• humus

• topsoil

• bedrock

Sedimentary rocks ___________.

• form when sediment is pressed together

• often form in layers

• form from existing rocks

• all of the above