Chapter 3 Our Changing Earth

1. Take a look at the following remark on earthquakes.

1. Earthquakes occur when energy is released, causing waves to flow in all directions.
2. The focus of an earthquake is the location in the crust where the movement begins as well as the source of seismic energy.
3. The epicentre of an earthquake is the location on the surface above the focus.

Select the correct response.

2. Take a look at the following statement about earth movements.

1. The only factor that causes earth motions is endogenic forces.
2. Earthquakes are caused by rapid movements caused by endogenic forces.
3. Landslides can also be caused by endogenic forces.

Select the correct response.

3. Which of the following is not a property of sea waves that causes erosion?

4. consider the following statement.

1. Statement : (A) The Lithospheric Plates are a set of plates that make up the lithosphere.
2. Reason : (R) This is because of the movement of the molten magma inside the earth.

Choose the correct answer

5. Consider the following statement: An earthquake is detected by a machine called………….?

Select the correct response.

6. Ox bow lakes are found in:

7. Take a look at the following statement about sedimentary rocks.

1. Exogenic geomorphic processes include only weathering and erosion.
2. Erosion is the process of the terrain being worn away by various factors such as water, wind, and ice.
3. Weathering is the breaking apart of rocks on the surface of the earth.

Select the correct response.

8. Consider the statement that the Niagara Falls is situated between .

Select the correct response.

9. Take a look at the following statement about a waterfall.

1. A waterfall is formed when a river tumbles at a steep angle over very hard rocks or down a steep valley wall.
2. Shivasamudram Falls is India’s second-largest waterfall.
3. There are no waterfalls on the Kaveri River.

Select the correct response.

10. Take a look at the following statement about a waterfall.

1. A waterfall is formed when a river tumbles at a steep angle over very hard rocks or down a steep valley wall.
2. Shivasamudram Falls is India’s second-largest waterfall.
3. There are no waterfalls on the Kaveri River.

Select the correct response.

11. Think about the following sentence.

1. The river twists and turns as it enters the plain, generating huge bends known as meanders.
2. Over flood and delta plains, meanders form.
3. In Bihar, there is an ox-bow lake called Gogabeel.

Select the incorrect response.

12. Mushroom rocks are found in:

13. Think about the following sentence.

1. A delta is formed by sediments collected from all distributary outlets.
2. Along the banks of big rivers, natural levees can be discovered.

Select the correct response.

14. The depositional feature of a glacier is:

15. Think about the following sentence.

1. caverns in the sea Is hollow in the same way that caves form on the rocks.
2. sea arches have no roof of the caves remain.
3. A sea cliff is a precipitous rocky coast that rises almost vertically above the sea.

Select the correct response.

16. ……… is caused by the sudden movements of the earth?

17. Think about the following sentence.

1. Moraines are lengthy ridges of glacial till deposits.
2. Mushroom rocks are narrower at the bottom and wider at the top.
3. Sand dune formation is best in dry, hot deserts.

Select the correct response.

18. Think about the following sentence.

1. Moraines are lengthy ridges of glacial till deposits.
2. Mushroom rocks are narrower at the bottom and wider at the top.
3. Sand dune formation is best in dry, hot deserts.

Select the correct response.

19. Match the following

Choose the correct answer