#1. The uppermost layer over the earth’s surface is called the ____
#2. ____ is the Earth’s thinnest of all the layers.
#3. The thickness of uppermost layer over the earth’s surface is about ___ km on the continental masses.
#4. The thickness of uppermost layer is ___ km on the ocean floors
#5. The main mineral constituents of the continental mass are ____
#6. The oceanic crust mainly consists_____
#7. To reach to the centre of the earth (which is not possible!) you will have to dig a hole ____ km. deep on the ocean floor.
#8. The deepest mine in the world is in ____.
#9. Depth of mantle is up to ____ km below the crust.
#10. The innermost layer is the earth is called ____
#11. The radius of core of about ____ km
#12. The innermost layer of earth is mainly made up of ___
#13. The central core has _____
#14. The radius of the earth is _____ km.
Write the volume of layers in %
#15. The crust ___ per cent of the volume of the earth
#16. Mantle consists of _____ per cent of earth volume.
#17. Core consists of ____ per cent of earth volume
#18. The remains of the dead plants and animals trapped in the layers of rocks are called _____
#19. Any natural mass of mineral matter that makes up the earth’s crust is called a ____
#20. Rock formed when the molten magma cools are called ______ rocks.
#21. ____ rocks are also called primary rocks.
#22. Rocks formed by rapidly cooling of molten lava on the earth’s surface are called ______ igneous rocks.
#23. Solid rocks so formed, when the molten magma cools down deep inside the earth’s crust are called ____ igneous rocks.
#24. extrusive igneous rocks are _____grained structure
#25. Intrusive igneous rocks are _____grained structure
#26. Basalt is example of ____
#27. Granite is an example ____ rock.
#28. The Deccan plateau is made up of ____rocks
#29. Stones used to prepare paste/powder of spices and grains are made of ___rocks.
#30. Rocks roll down, crack, and hit each other and are broken down into small fragments. These smaller particles are called ____
#31. Sediments are compressed and hardened to form layers of rocks. These types of rocks are called ____ rocks
#32. Sandstone is example of ____ rock.
#33. ____ rocks may also contain fossils of plants, animals and other microorganisms.
#34. Igneous and sedimentary rocks can change into _____ rocks under great heat and pressure
#35. clay changes into ___ under great heat and pressure.
#36. limestone change into _____ under great heat and pressure
#37. The Red Fort is made of red _____
#38. The Taj Mahal is made of white ____
#39. This process of transformation of the rock from one to another is known as the ____
#40. Igneous rocks are broken down into small particles that are transported and deposited to form ____ rocks
#41. When the igneous and sedimentary rocks are subjected to heat and pressure they change into ____ rocks.
#42. The metamorphic rocks which are still under great heat and pressure melt down to form molten ____
#43. Rocks are made up of different ____
#44. ____ are naturally occurring substances which have certain physical properties and definite chemical composition.
#45. Gold, petroleum and coal are examples of ____
#46. Made of silicon and alumina