Question

understanding key ideas

1. what is the difference between natural rain and acid precipitation?
2. explain two reasons why soil conservation is important.
3. describe three landforms that are shaped by weathering and erosion.
4. explain two ways that weathering and erosion are related.
5. identify three ways that climate affects the rate of weathering.

Explanation:

Question 22:

Natural rain is slightly acidic with a pH around 5.6 due to carbon - dioxide dissolution. Acid precipitation has a pH below 5.6, caused by pollutants like sulfur dioxide and nitrogen oxides reacting with water in the atmosphere.

Question 23:

1. It ensures food security by maintaining fertile soil for agriculture. 2. It helps prevent soil - related environmental problems like erosion and sedimentation in water bodies.

Question 24:

1. Canyons: Formed by the erosive action of rivers over time. 2. Cliffs: Created by weathering and erosion, especially coastal cliffs from wave action. 3. Sand dunes: Shaped by wind - driven erosion and deposition of sand.

Question 25:

1. Weathering breaks down rocks into smaller particles, which can then be transported away by erosion. 2. Erosion can expose new rock surfaces to weathering agents, accelerating the weathering process.

Question 26:

1. Temperature: Higher temperatures can speed up chemical weathering reactions. 2. Precipitation: More rainfall can increase chemical weathering and also provide water for physical weathering like freeze - thaw cycles. 3. Wind: Strong winds can enhance mechanical weathering and carry abrasive particles for erosion, which can also affect weathering rates.

Answer:

Question 22:

Natural rain has a pH around 5.6 due to carbon - dioxide, while acid precipitation has a pH below 5.6 from pollutants.

Question 23:

Ensures food security, prevents environmental problems.

Question 24:

Canyons, cliffs, sand dunes.

Question 25:

Weathering provides material for erosion, erosion exposes new rock for weathering.

Question 26:

Temperature, precipitation, wind.