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Rocks And Minerals Important Question Answer - Class 4 Science - Fully Solved Notes For Students

Q1: What are the small grains that make up rocks called?
Ans:
Minerals


Q2: What are the three main types of rocks based on their formation?
Ans: Igneous, sedimentary, and metamorphic rocks


Q3: What is the process by which igneous rocks are formed?
Ans: Cooling and hardening of molten rock


Q4: What percentage of the Earth's crust is made up of igneous rocks?
Ans: About 95%


Q5: Which type of igneous rock is used for making kitchen counters and floors?
Ans: Granite


Q6: What type of sedimentary rock is used in the construction of the Red Fort in Delhi and Agra Fort in Agra?
Ans: Sandstone


Q7: What is the process that turns lower layers into sedimentary rocks?
Ans: Repeated deposition and pressure


Q8: How are metamorphic rocks formed?
Ans: Due to changes in existing rocks caused by high temperature and pressure


Q9: Which non-metallic mineral is used for making blackboards and handheld writing boards?
Ans: Slate


Q10: What are the two main categories of minerals mentioned in the text?
Ans: Metallic and non-metallic minerals


Q11: What are metallic minerals that contain metals such as gold, iron, and copper called?
Ans: Ores


Q12: Which fossil fuel is formed from the remains of dead plants and sea animals buried under the sea?

Ans: Petroleum


Q13: What is the primary use of coal?
Ans: Fuel for cooking, electricity production, and running steam engines


Q14: Why is it important to conserve coal and petroleum?
Ans: They are limited resources; overuse causes pollution and depletion.


Q15: What is a non-polluting and renewable source of energy mentioned in the text?
Ans: Solar energy

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FAQs on Rocks And Minerals Important Question Answer - Class 4 Science - Fully Solved Notes For Students

1. What are the main types of rocks?
Ans. The main types of rocks are igneous, sedimentary, and metamorphic, each formed through different geological processes.
2. How are igneous rocks formed?
Ans. Igneous rocks are formed from the solidification of molten rock, either magma beneath the Earth's surface or lava at the surface.
3. What is the difference between minerals and rocks?
Ans. Minerals are naturally occurring inorganic substances with a specific chemical composition, while rocks are composed of one or more minerals or mineraloids.
4. How do sedimentary rocks develop?
Ans. Sedimentary rocks develop from the accumulation and compaction of mineral and organic particles, often in layers over time.
5. What role do minerals play in everyday life?
Ans. Minerals are essential for various everyday applications, including construction, manufacturing, and as nutrients in biological processes.
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