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Class 7 Geography Chapter 2 Question Answers - Inside Our Earth
Q.1: Our earth is constantly undergoing changes inside and outside.( T/F)
Ans: True
Q.2: The uppermost layer of the earth surface is called the…………….
Ans: Crust
Q.3: The oceanic crust mainly consists of ………………and …………….
Ans: Silica and Magnesium
Oceanic Crust
Q.4: Any natural mass of mineral matter that makes up the earth’s crust is called……………….
Ans: Rock
Q.5: All rocks are made up of the same minerals. (T/F)
Ans: False
Q.6: The radius of the earth is……………km.
Ans: 6371
Q.7: The deepest mine of the world is in which country.
Ans: South Africa
Q.8: The upper crust is made up of minerals like silicon and aluminium while lower constitutes silicon and magnesium. (T/F)
Ans: True
Q.9: Basalt is the example of which of the following rocks-
a. Igneous
b. Sedimentary
c. Metamorphic
d. primary
Ans: Igneous
Basalt
Q.10: Deccan plateau is made up of …………………rocks.
Ans: Basalt
Q.11: Is the earth a dynamic planet?
Ans: Yes
Q.12: Where is the deepest mine in the world located?
Ans: In South Africa, about 4 km deep.
Q.13: Due to intense heat and pressure, the granite rocks change into
a. Schist
b. Slate
c. Marble
d. Gneiss
Ans: Gneiss
Q.14: Which of the following is not the transform form of rocks?
a. Slate
b. Q.uartzite
c. Marble
d. Sandstone
Ans: Sandstone
Sandstone
Q.15: Sedimentary Latin word sedimentum meaning………………….
Ans: Settle down
Q.16: Igneous rocks form when molten magma cools and solidifies.(T/F)
Ans: True
Q.17: The innermost layer is the core with a radius of about…………km.
Ans: 3500 km
Q.18: Coal, gold, and petroleum are examples of-
a. Rocks
b. Fossil
c. Minerals
d. Sand
Ans: Mineral
Q.19: Define the rock cycle?
Ans: The process of transformation of the rock from one to another is known as the rock cycle.
Gneiss
Q.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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