This is HL #5. Do both on the same sheet of loose leaf notebook paper. Follow all directions.
Students will be able to:
use information from laboratory experiments and classroom discussion to
-compare/contrast physical and chemical weathering.
The do now was an FCAT transparency.
Students received HL 5, which can be found at the top of this blog.
Students took notes on chemical and mechanical weathering:
Chemical weathering takes place when rocks break apart as a result of chemical changes. The types of chemical weathering include:
-oxidation-the chemical reaction of oxygen with other substances.
-hydrolysis-the chemical reaction of water with other substances.
-carbonation-when carbonic acid breaks down materials in rocks.
-plant actions-plants produce acids that cause chemical weathering.
Mechanical weathering-breaking rocks down by physical means where the composition of the rocks remain the same. The types of mechanical weathering include:
-temperature changes- rocks are broken down by changes in temperature.
-ice wedging-repeated freezing and melting of water in the cracks of rocks causes the rocks to break apart.
-root action-roots of plants grow into cracks of rocks and break them apart.
