Last updated on June 28th, 2023 at 11:05 pm
Our Changing Earth Class 7 Questions and Answers
Answer the following questions.
Que- Why do the plates move?
because of the movement of the molten magma inside the earth.
Que- What are exogenic and endogenic forces?
The forces that work on the surface of the earth are called exogenic forces while The forces which act in the interior of the earth are called endogenic forces.
Que- What is erosion?
Erosion is the wearing away of the landscape by different agents like water, wind, and ice.
Que- How are flood plains formed?
When a river overflows its banks, it deposits layers of fine soil and other material along its banks. It results in the formation of a flat fertile floodplain.
Que- What are sand dunes?
Sand dunes are the low hill-like structures formed in the desert when wind deposits sand at one place.
How are beaches formed?
Beaches are formed when sea waves deposit sediments along the shoreline
Que- What are oxbow lakes?
Through erosion and deposition along the sides of the meander loop, the ends of the loop come closer and closer to each other, eventually cutting off from the river and forming a “cutoff lake.”called an ox-bow lake.
Tick the correct answer.
Which is not an erosional feature of sea waves?
- Cliff
- Beach
- Sea cave
The depositional feature of a glacier is:
- Flood plain
- Beach
- Moraine
Which is caused by the sudden movements of the earth?
- Volcano
- Folding
- Flood plain
Mushroom rocks are found in:
- Deserts
- River valleys
- Glaciers
Ox bow lakes are found in:
- Glaciers
- River valleys
- Deserts
Give reasons.
Que- Some rocks have a shape of a mushroom.
A windy environment is an active agent for erosion in deserts, which erodes the lower part of rocks more than the upper part. As a result, some rocks have a mushroom-like shape with a narrow base and a wide top.