Rocks, Weathering, Soil unit test review

Water chemically breaks down rock because 

• water expands when it freezes
• materials in the water are deposited
• acides in water react with chemicals in the rock
• water is not affected by wind 

which activities can help prevent soil erosion?

• cover crops, crop rotation, and contour plowing
• strip mining and deforestation
• building cities and highways

Which of the following describes the movement of soil by wind, water, ice, and/or gravity?

• desertification
• soil conservation
• erosion
• habitat

The decayed organic material in soil is called?

• abrasion
• humus
•  bedrock
• leaching 

soil horizon A which consists of humus, decayed organic materials, is also called? 

• topsoil
• middle soil
• subsoil
• bottom soil 

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

• igneous

• instrusive

• sedimentary

• metamorphic

Soil is a complex mixture of

• minerals

• humus

• air and water

• all of the above

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

What type of rock is most likely to form from weathering and erosion?

• lava

• sedimentary

• igneous

• metamorphic

The rock cycle suggests that ______________.

• rocks are always being added to Earth's mass

• rocks disappear from Earth as they go underground

• rocks are continually recycled into different forms

• rocks always stay in the same form