1. What is the outermost layer of the Earth called?
👉 Crust
2. Name the three layers of the Earth.
👉 Crust, mantle, core
3. Which layer lies just below the crust?
👉 Mantle
4. What is the innermost layer of the Earth?
👉 Core
5. Which layer is very hot and heavy?
👉 Core
6. What is the crust made of?
👉 Rocks and minerals
7. What are rocks?
👉 Natural solid substances
8. What are minerals?
👉 Useful natural substances
9. How many types of rocks are there?
👉 Three
10. Name the three types of rocks.
👉 Igneous, sedimentary, metamorphic
11. Which rocks are called primary rocks?
👉 Igneous rocks
12. How are igneous rocks formed?
👉 From molten magma
13. Which rocks are formed by layers of sediments?
👉 Sedimentary rocks
14. Name one example of sedimentary rock.
👉 Sandstone
15. Which rocks change form due to heat and pressure?
👉 Metamorphic rocks
16. Name one metamorphic rock.
👉 Marble
17. What is magma?
👉 Molten rock material
18. What is lava?
👉 Magma on surface
19. What is rock cycle?
👉 Continuous rock formation process
20. Which rock contains fossils?
👉 Sedimentary rock
21. What are uses of rocks?
👉 Construction and tools
22. Which mineral is used to make jewellery?
👉 Gold
23. Which mineral is used to make pencils?
👉 Graphite
24. Which mineral is used in making utensils?
👉 Aluminium
25. What do miners do?
👉 Extract minerals
26. What is mining?
👉 Extraction of minerals
27. Why are minerals important?
👉 Industrial development
28. Which layer has the highest temperature?
👉 Core
29. Which layer supports life?
👉 Crust
30. What are sedimentary rocks also known as?
👉 Layered rocks
📌 Quick Memory Trick for Students
👉 Layers of Earth:
C-M-C → Crust – Mantle – Core
👉 Types of Rocks:
I-S-M → Igneous – Sedimentary – Metamorphic