Mechanical and Chemical Weathering: Engage and Explore

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​Physical versus Chemical Change in Matter

Multiple Choice

Now that you have watched the video clip, how is chemical change different from physical change?

• Pollutants are formed during a chemical change.

• New substances are formed during a chemical change.

• Only living things drive the process of chemical change.

• Material is broken down into smaller pieces without any chemical reactions during a chemical change.chcacachenucak c

Multiple Choice

How are trees agents of mechanical weathering?

• Growing tree roots physically break apart rock.

• Tree roots secrete a lot of acids that react with minerals in the rock.

• Trees cause chemical reactions to take place altering the soil and rock nearby.

• Trees do not cause rocks to weather.

Multiple Choice

True or False: Water can cause both physical and chemical weathering.

• True

• False

Multiple Choice

Which is an example of chemical weathering?

• Glaciers scrape away bits of rock as they advance across Earth's surface.

• Tree roots extending into cracks in a rock thicken as they grow, splitting the rock into fragments.

• Water that has become ionized reacts with silicate minerals in a rock, producing new minerals.

• Wind carrying sediment causes a rock surface to break down into smaller sediments.chemi

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Multiple Choice

Chemical reaction of Oxygen with other substances. 

• weathering

• oxidation

• erosion

• transported soil

Multiple Choice

Process that breaks down rocks and minerals into smaller pieces but doesn't change composition.

• Chemical Weathing

• Volcanism
• Mechanical Weathering

• Erosion

Multiple Choice

The process where rock and minerals undergo changes in composition.

• erosion
• mechanical weathering

• chemical weathering

• deposition

Open Ended

Why would 10, 1 kg pieces of limestone weather more quickly than one 10 kg piece of limestone?