Weathering - Part 2

The mechanical and chemical processes that change objects on Earth’s surface over time are called _____________

• Physical Weathering

• Chemical Weathering

• Frost Wedging

• Weathering

Acid rain has a pH of _______ or less.

• 6.5

• 7.0

• 4.5

• 9.5

Acid rain can cause more chemical weathering than normal rain causes.

• False

• True

Normal rain can cause more chemical weathering than acid rain causes.

• True

• False

_________ combines the element oxygen with other elements or molecules.

_________ combines the element oxygen with other elements or molecules.

• Precipitation

• Oxidation

• Frost Wedging

• Decomposition

Most of the oxygen needed for oxidation comes from the _______

• water

• air

• soil

• ice

The outer part of the rock oxidizes the most as this has the most contact with oxygen in the air.

• True

• False

When iron in rock reacts with oxygen from the air, a layer of red ___________ forms on its outside surface.

• Aluminum oxide

• iron oxide

• Potassium oxide

• granite

The environment in which weathering occurs helps determine the rate of weathering.

• False

• True