Unit 3 - Weathering, Erosion, & Soil

3.1 Weathering

100

when rocks are broken down into smaller pieces (weathering or erosion)

weathering

200

when a rock's minerals are changed into new substances (chemical reactions) - mechanical weathering or chemical weathering

chemical weathering

300

when oxygen from the air and water reacts with the iron in rocks (oxidation or acid rain)

oxidation

400

rain, sleet, or snow that contains an abnormal amount of acid  (oxidation or acid rain)

acid rain

3.2 Erosion

100

When water, ice, wind, and gravity move particles of rock and soil from one place to another. (erosion or weathering)

erosion

200

A mass of ice that covers a large area and moves slowly and causes erosion. (Glacier or Iceberg)

Glacier

300

When rocks are dropped or laid down after erosion.  Is this weathering or deposition?

deposition

400

Was the Grand Canyon mostly formed from water erosion or wind erosion?

water erosion

3.3 Soil

100

Soil is a mixture of weathered rock particles, ________, and plant/animal remains (aka "humus").  [minerals or mud]

minerals

200

the top layer of soil that contains nutrients and minerals that living plants need in order to grow.  (Topsoil or Subsoil)

Topsoil

300

the layer of soil below the topsoil (subsoil or bedrock)

subsoil

400

Name a type of soil (look in your notes) besides clay soil

sandy, peaty, loamy, silty, chalky