The video explains how weathering breaks rocks into sediments, which are then moved by erosion and settled by deposition. It covers mechanical weathering, such as water and ice effects, and chemical weathering, like acid rain. Erosion involves sediment movement, while deposition is the settling of sediments, often forming new rocks over time.

What is the primary cause of weathering?

• Weather elements

• Animal activities

• Human activities

• Volcanic eruptions

Which of the following is an example of mechanical weathering?

• Oxidation of minerals

• Water freezing and expanding in rock cracks

• Acid rain dissolving limestone

• Carbonation of rocks

How do tree roots contribute to mechanical weathering?

• By providing shade that cools rocks

• By absorbing water from rocks

• By growing between cracks and acting as wedges

• By producing acids that dissolve rocks

What is the main agent in chemical weathering?

• Wind

• Water

• Acids

• Temperature changes

Which type of rock is particularly susceptible to acid rain?

• Basalt

• Sandstone

• Granite

• Limestone

What is erosion?

• The movement of sediments from one place to another

• The formation of new rocks

• The breaking down of rocks into smaller pieces

• The chemical alteration of rock minerals

Tags

NGSS.MS-ESS2-2

What can prevent significant erosion in a forested area?

• Clearing the forest

• Strong winds

• Heavy rainfall

• The presence of trees and vegetation

What is deposition?

• The breaking down of rocks into sediments

• The chemical alteration of rock minerals

• The settling of sediments in a new location

• The movement of sediments by wind or water

Tags

NGSS.MS-ESS2-4

Where does deposition typically occur?

• On mountain tops

• At the bottom of lakes and salt pans

• On the surface of glaciers

• In the middle of rivers

What can happen to sediments over years after deposition?

• They can evaporate

• They can form new sedimentary rocks

• They can turn into magma

• They can become fossils

Tags

NGSS.MS-ESS2-1