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Model Activity Task Class 7 Geography Part 2
All questions which are given in Part 2 for class 7th are given one by one. So we hope you will enjoy our article.
1. Answer the following questions.
Q No: 1 What are the three layers of the earth?
Answer: The three layers of the Earth are the crust, mantle, and core. The crust is the outermost layer, the mantle is in the middle, and the core is at the center of the Earth.
Q No: 2 What is a rock?
Answer: A rock is a solid, natural substance made up of minerals.
Q No: 3 Name three types of rocks?
Answer: The three types of rocks are igneous rocks, sedimentary rocks, and metamorphic rocks.
Q No: 4 How are extrusive and intrusive rocks formed?
Answer: Extrusive rocks are formed from lava that cools on the Earth’s surface, while intrusive rocks are formed from magma that cools beneath the Earth’s surface.
Q No: 5 What do you mean by a rock cycle?
Answer: The rock cycle is a process where rocks are formed, changed, and recycled over time.
Q No: 6 What are the uses of rocks?
Answer: Rocks are used for construction, making tools, creating roads, and as a source of minerals and energy resources.
Q No: 7 What are metamorphic rocks?
Metamorphic rocks are rocks that have changed form due to heat and pressure inside the Earth.
2. Tick the Correct Answer
(i) The rock which is made up of molten magma is
(a) Igneous (b) Sedimentary (c) Metamorphic
Ans: (a) Igneous
(ii) The innermost layer of the earth is
(a) Crust (b) Core (c) Mantle
Ans: (b) Core
(iii) Gold, petroleum, and coal are examples of
(a) Rocks (b) Minerals (c) Fossils
Ans: (b) Minerals
(iv) Rocks which contain fossils are
(a) Sedimentary rocks
(b) Metamorphic rocks
(c) Igneous rocks
Ans: (a) Sedimentary rocks
(v) The thinnest layer of the earth is
(a) Crust (b) Mantle (c) Core
Ans: (a) Crust
3. Match the following
(i) Core – (e) Innermost layer
(ii) Minerals – (d) Has the definite chemical composition
(iii) Rocks – (b) Used for roads and buildings
(iv) Clay – (c) Made of silicon and alumina
(v) Sial – (a) Earth’s surface
(f) Changes into slate – (g) Process of transformation of the rock
4. Give Reasons for the following
(i) We cannot go to the center of the earth.
Reason: We cannot go to the center of the Earth because of extreme heat, high pressure, and the lack of technological means to penetrate such depths.
(ii) Sedimentary rocks are formed from sediments
Reason: Sedimentary rocks are formed from sediments through compaction and cementation.
(iii) Limestone is changed into marble.
Reason: Limestone is changed into marble through the process of metamorphism.
What are the minerals most commonly used in the following objects?
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