Weathering and Erosion

What is the primary difference between mechanical and chemical weathering?

• Mechanical weathering involves breaking rocks into smaller pieces, while chemical weathering involves changing the composition of minerals.

• Mechanical weathering is faster than chemical weathering.

• Chemical weathering only affects sedimentary rocks.

• Mechanical weathering is the result of volcanic activity.

What causes mechanical weathering in mountainous areas?

• Plant roots penetrating rock joints

• High levels of humidity

• High temperatures

• Chemical reactions with air

Which of the following minerals is attacked by carbonic acid, leading to chemical weathering?

• Iron

• Basalt

• Granite

• Potassium feldspar

What determines the speed at which rock weathering occurs?

• The type and hardness of the minerals in the rocks

• The presence of volcanic activity

• The amount of sunlight

• The proximity to the ocean

What is the key result of weathering, as mentioned in the text?

• Formation of volcanoes

• Formation of soil

• Formation of sedimentary rocks

• Formation of minerals

What is the downslope movement of rocks and soil under the direct influence of gravity called?

• Erosion

• Mass wasting

• Weathering

• Deposition

What is the primary cause of soil erosion in areas like the Philippines?

• Heavy precipitation or rain

• Volcanic eruptions

• Desertification

• Glacial movement

Which activity does NOT contribute to erosion?

• Kaingin method

• Logging

• Infrastructure projects

• Forest preservation

What is the primary process involved in wind-driven erosion in desert regions?

• Deflation

• Subduction

• Volcanism

• Sedimentation

What do wind-blown deposits of fine-grained clay and silt create around water reservoirs?

• Blowouts

• Desert pavement

• Dunes

• Deltas