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Class 7 Geography Chapter 2 Question Answers - Inside Our Earth
Very Short Q & A:
Ques 1: Our earth is constantly undergoing changes inside and outside.( T/F)
Ans: True
Ques 2: The uppermost layer of the earth surface is called the…………….
Ans: Crust
Ques 3: The oceanic crust mainly consists of ………………and …………….
Ans: Silica and Magnesium
Fig: Oceanic Crust
Ques 4: Any natural mass of mineral matter that makes up the earth’s crust is called……………….
Ans: Rock
Ques 5: All rocks are made up of the same minerals. (T/F)
Ans: False
Ques 6: The radius of the earth is……………km.
Ans: 6371
Ques 7: The deepest mine of the world is in which country.
Ans: South Africa
Ques 8: The upper crust is made up of minerals like silicon and aluminium while lower constitutes silicon and magnesium. (T/F)
Ans: True
Ques 9: Basalt is the example of which of the following rocks-
a. Igneous
b. Sedimentary
c. Metamorphic
d. primary
Ans: Igneous
Fig: Basalt
Ques 10: Deccan plateau is made up of …………………rocks.
Ans: Basalt
Ques 11: Is the earth a dynamic planet?
Ans: Yes
Ques 12: Where is the deepest mine in the world located?
Ans: In South Africa, about 4 km deep.
Ques 13: Due to intense heat and pressure, the granite rocks change into
a. Schist
b. Slate
c. Marble
d. Gneiss
Ans: Gneiss
Ques 14: Which of the following is not the transform form of rocks?
a. Slate
b. Ques uartzite
c. Marble
d. Sandstone
Ans: Sandstone
Fig: Sandstone
Ques 15: Sedimentary Latin word sedimentum meaning………………….
Ans: Settle down
Ques 16: Igneous rocks form when molten magma cools and solidifies.(T/F)
Ans: True
Ques 17: The innermost layer is the core with a radius of about…………km.
Ans: 3500 km
Ques 18: Coal, gold, petroleum are examples of-
a. Rocks
b. Fossil
c. Minerals
d. Sand
Ans: Mineral
Ques 19: Define the rock cycle?
Ans: The process of transformation of the rock from one to another is known as the rock cycle.
Fig: Gneiss
Ques 20: Core is made up of………… and …………….
Ans: Nickel, iron
The document Class 7 Geography Chapter 2 Question Answers - Inside Our Earth is a part of the Class 7 Course Social Studies (SST) Class 7.
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FAQs on Class 7 Geography Chapter 2 Question Answers - Inside Our Earth
| 1. What are the layers of the Earth? |  |
| 2. How thick is the Earth's crust? | |
Ans. The thickness of the Earth's crust varies depending on the location. On average, the oceanic crust is about 5-10 kilometers thick, while the continental crust can range from 20-70 kilometers thick.
| 3. What is the composition of the Earth's mantle? | |
Ans. The Earth's mantle is composed mainly of solid rock, specifically silicate minerals rich in iron and magnesium. It is the thickest layer of the Earth, accounting for about 84% of its volume.
| 4. What is the temperature of the Earth's core? | |
Ans. The temperature of the Earth's core is estimated to be around 5,000-6,000 degrees Celsius (9,000-11,000 degrees Fahrenheit). The core is divided into the outer core, which is liquid, and the inner core, which is solid.
| 5. How do scientists study the Earth's interior? | |
Ans. Scientists study the Earth's interior through various methods, including seismic waves, drilling, and studying volcanic eruptions. Seismic waves, generated by earthquakes, provide valuable information about the different layers and their properties. Drilling allows scientists to collect samples from the Earth's crust, while volcanic eruptions provide insights into the composition of the mantle.
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