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Our Changing Earth Class 7 MCQs Questions with Answers
Appearing Students of Class 7 Exams can download MCQ on Our Changing Earth Class 7 with Answers from here. By practicing Class 7 Geography Chapter 3 MCQ with Answers, you can score well in the exam. Download Class 7 SST Geography Chapter 3 MCQ in PDF format from the below access links and start practicing on a regular basis for better subject knowledge.
Question 1.
The place in the crust where the movement of the earth starts is called the:
(a) Focus
(b) Epicentre
(c) Point
Answer
Answer:
Question 2.
After the river enters the plain, it twists and turns forming large bends known as:
(a) Meanders
(b) Ox-bow lake
(c) Levees
Answer
Answer:
Question 3.
Large deposits of loess is found in:
(a) South Korea
(b) Malaysia
(c) China
Answer
Answer:
Question 4.
The highest waterfall of the world is:
(a) Niagara falls
(b) Angel falls
(c) Victoria falls
Answer
Answer:
Question 5.
Which waterfall is located on the border between Canada and USA in North America?
(a) Angel falls
(b) Niagara falls
(c) Victoria falls
Answer
Answer:
Question 6.
At what magnitude is earthquake classified as major earthquake?
(a) 2.0
(b) 5.5
(c) 7.0
Answer
Answer:
Question 7.
Which is caused by the sudden movements of the earth?
(a) Volcano
(b) Folding
(c) Flood plain
(d) All of these
Answer
Answer: (a) Volcano
Volcano is caused by the sudden movements of the earth. A volcano is a vent opening in the earth’s crust through that molten material erupts suddenly.
Question 8.
Where are Mushroom rocks are found?
(a) Deserts
(b) River valleys
(c) Glaciers
(d) Sea cliff
Answer
Answer: (a) Deserts
An active agent of erosion and deposition in the deserts is win(d) In deserts rocks are in the shape of a mushroom, commonly called mushroom rocks.
Question 9.
What is known as the steep rocky coast rising most vertically above the sea water?
(a) Sea cliff
(b) Glaciers
(c) Sea waves
(d) Stacks
Answer
Answer: (a) Sea cliff
The steep rocky coast rising most vertically above the sea water is called sea cliff. The sea waves deposit sediments along the shores forming beaches.
Question 10.
Where is the Angel falls located?
(a) South Africa
(b) South America
(c) South India
(d) None of these
Answer
Answer: (b) South America
There are thousands of small waterfalls in the worl(d) The highest waterfall is Angel Falls of Venezuela in South Americ(a)
Question 11.
What are the sudden movements in the earth crust are called?
(a) Focus
(b) Deposition
(c) Erosion
(d) Earthquake
Answer
Answer: (d) Earthquake
Endogenic forces sometimes produce sudden movements and at the other times produce slow movements. Sudden movements like earthquakes and volcanoes cause mass destruction over the surface of the earth.
Question 12.
What do you mean by a glacier?
(a) Moving of Layer of earth
(b) Moving of Soil
(c) Moving of ice
(d) None of these
Answer
Answer: (c) Moving of ice
Moving rivers of ice are called glaciers.
Question 13.
What are the types of earthquake waves?
(a) P wave
(b) S wave
(c) L wave
(d) All of the above
Answer
Answer: (d) All of the above
P wave and longitudinal waves, S wave or transverse waves and L waves or surface waves.
Question 14.
What do you know by Ox-bow Lakes?
(a) Lakes formed from animal participation
(b) Lakes for ox
(c) Cutting of meander loop from main rivers
(d) None of these
Answer
Answer: (c) Cutting of meander loop from main rivers
When the meander loop is cut off from the main river it forms a cut-off lake. As its shape is like an ox-bow, it is also known as ox-bow Lake.
Question 15.
What are sand-dunes?
(a) Low hill-like structures
(b) Big mountains
(c) Volcano
(d) None of these
Answer
Answer: (a) Low hill-like structures
Sand dunes are low hill-like structures formed by the deposition of sand in the deserts.
Question 16.
What do you mean by erosion?
(a) Moving of plates
(b) Type of exogenic forces
(c) Wearing away of landscape
(d) None of these
Answer
Answer: (c) Wearing away of landscape
Erosion is the wearing away of the landscape by different agents like water, wind and ice.
Match the following
1.
| Column I | Column II |
| 1. Weather | (a) Wearing away of the landscape by different agents |
| 2. Erosion | (b) Raised banks |
| 3. Victoria falls | (c) Breaking up of rocks |
| 4. Levees | (d) Collection of sediments |
| 5. Delta | (e) Zambia and Zimbabwe |
Answer
Answer:
| Column I | Column II |
| 1. Weather | (c) Breaking up of rocks |
| 2. Erosion | (a) Wearing away of the landscape by different agents |
| 3. Victoria falls | (e) Zambia and Zimbabwe |
| 4. Levees | (b) Raised banks |
| 5. Delta | (d) Collection of sediments |
Fill in the blanks
1. An earthquake is measured with a machine called ……………. .
Answer
Answer: seismograph
2. The lithosphere is broken into a number of plates known as the ……………. plates.
Answer
Answer: lithospheric
3. The ……………. forces act in the interior of the earth.
Answer
Answer: endogenic
4. The ……………. forces work on the surface of the earth.
Answer
Answer: exogenic
5. When the ……………. plates move, the surface of the earth vibrates.
Answer
Answer: lithospheric
6. The place above the focus is called the ……………. .
Answer
Answer: epicentre
7. The strength of the earthquake decreases away from the ……………. .
Answer
Answer: centre
8. The magnitude of the earthquake is measured on the ……………. .
Answer
Answer: Richter scale
9. The landscape is being continuously worn away by two processes ……………. and ……………. .
Answer
Answer: weathering, erosion
10. When the river tumbles at steep angle over hard rocks or down a steep valley side, it forms a ……………. .
Answer
Answer: waterfall
11. The raised banks are called ……………. .
Answer
Answer: levees
12. The erosion and deposition of the sea waves give rise to ……………. landforms.
Answer
Answer: coastal
13. ……………. are “rivers” of ice.
Answer
Answer: Glaciers
Picture Based Questions
1. In the following picture, identify Sea Cave, Sea Arch and Stack.
Answer
Answer:
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