DAY-4 CLASS-7 SOCIAL L-2 QUIZZ

What is the main focus of the exploration described in "Our Changing Earth"?

• The study of animal migration patterns

• The examination of exogenic forces shaping the planet's surface

• The history of human civilization

• The formation of the solar system

Why are exogenic forces important in shaping the Earth's surface? Use reasoning based on the processes mentioned.

• They continuously sculpt and reshape the surface through weathering, erosion, and deposition.

• They create new planets in the solar system.

• They are responsible for volcanic eruptions only.

• They help plants grow faster.

How do weathering, erosion, and deposition work together to shape landforms?

• Weathering breaks down rocks, erosion moves the particles, and deposition lays them down in new places

• Erosion creates rocks, weathering moves them, and deposition breaks them down

• Deposition breaks rocks, weathering moves them, and erosion lays them down

• Weathering and erosion only occur in the ocean, while deposition happens on land

What happens to the minerals in rocks during chemical weathering?

• They physically break apart without changing composition

• They chemically alter when exposed to water, oxygen, and acids, changing their composition

• They are moved from one place to another by wind

• They are compressed into new rocks

A rock is found to have cracks caused by repeated freezing and thawing of water, but its composition remains unchanged. Which type of weathering is most likely responsible, and why?

• Chemical weathering, because the minerals have changed composition

• Biological weathering, because plants caused the cracks

• Physical weathering, because the rock fractured without changing its composition

• Erosional weathering, because the rock was moved

A scientist observes that a rock has changed its mineral composition after being exposed to rainwater and air for many years. Which process best explains this change, and what evidence supports your answer?

• Physical weathering, because the rock broke apart

• Chemical weathering, because exposure to water and oxygen changed the rock’s composition

• Biological weathering, because animals burrowed into the rock

• Erosional weathering, because the rock was carried away by water

What is erosion?

• The process where weathered rock particles are picked up and transported away by natural agents

• The process of rocks forming from magma

• The process of plants growing in soil

• The process of water evaporating from lakes

What happens when wind slows down, water flow decreases, or ice melts in terms of sediment transport?

• They can no longer carry their sediment load

• They carry more sediment

• Sediments dissolve completely

• Sediments become lighter

What is demonstrated when riverbanks lose soil and beaches retreat because of moving water and wind?

• Weathering

• Erosion

• Deposition

• Freezing

Which of the following is the correct order for matching a natural process as described in the reinforcement activity?

• Real-world Example → Process → Natural Agent

• Natural Agent → Process → Real-world Example

• Process → Real-world Example → Natural Agent

• Natural Agent → Real-world Example → Process