rocks/soil

The cooled and hardened magma from volcanoes form what rocks?

• igneous
• sedimentary
• metamorphic 
• fossils

Hot, molten rock inside the earth is called ...

• lava
• magma
• igneous rock
• minerals

You dig a small hole in the soil and the next day it rains. The hole fills with water, but does not empty even after several days of dry weather. What is the soil mostly made of?

• clay
• sand
• humus
• silt

Many plants cannot grow in clay soil. Why is this true?

• Clay soil does not have many nutrients.
• Roots cannot easily push through clay soil.
• Water doesn't drain well through clay.
• All of these choices.

Which of the following is NOT one of the three types of soil?

• clay
• sand
• silt
• mud

Which of these definitions correctly describes the meaning of weathering?

• the breaking of materials, such as rocks and soil 
• the movement of materials, such as rocks and soil
• the dropping off of rocks and soil in a new place
• huge sheets of moving ice

What three things cause most erosion?

• rain, snow, sleet
• weathering, erosion, deposition
• glaciers, moraines, valleys
• wind, ice, water

Correctly fill in the blanks for the following statement.
Erosion moves materials from _____________ places and drops them in _____________ places.

• low, high
• low, low
• high, low
• high, high

The layer under the topsoil is called.....

• bedrock
• subsoil
• topsoil
• humus

This soil is coarse, with large grains, and drains quickly.

• humus
• loam
• sand
• clay