Class 5 Science Chapter 8 Test 1 Welcome to your Class 5 Science Chapter 8 Test 1 1. There are ________ layers of the Earth. Two Three Four five 2. Internal core is ________. Solid Complete liquid Molten fluid None of these 3. The weight of internal core of the Earth is ________ of the total of the Earth. 16% 33% 50% 97% 4. The diameter of the Earth is ________km. 11800 km 12800 km 12000 km 13800 km 5. The temperature of the core is about ________0C. 4000 5000 6000 7000 6. The average thickness of the crust of the Earth is ________. 1 to 70 km 5 to 70 km 10 to 70 km 10 to 700 km 7. The hot fluid in ________ of the Earth comes out of the Earth surface in form of lava during volcano eruption Crust Mantle Core None of these 8. ________ contains lofty mountains, deep oceans, rivers, green fields, rural and urban dwellings. Crust Mantle Core All of these 9. It takes about 1000 years to make only a ________cm thick layer of soil. 5 50 500 5000 10. The only planet of the solar system where conditions are suitable for the existence of life is ________. Mars Jupiter Venus Earth 11. Internal core contains elements like iron and nickel. Internal External Mantle Crust 12. The volume of internal core of the Earth is ________ of the total volume of the Earth. 16% 33% 50% 97% 13. The layer of the Earth under the crust is called ________. Crust Mantle Core None of these 14. The biggest part of the Earth by volume is ________. Crust Mantle Core None of these 15. ________ consists of solid matter. Crust Mantle Core All of these 16. The central part of the Earth is called the ________. Crust Mantle Core None of these 17. ________ is extremely hot and highly thick fluid like honey. Crust Mantle Core None of these 18. The hottest part of the Earth is its ________. Crust Mantle Core None of these 19. The outer shell of the Earth is called ________. Crust Mantle Core All of these 20. The Earth’s core consists of ________ parts. Two Three Four Five 21. The thickness of the mental is about ________. 2900 km 3900 km 3000 km 13800 km 22. External core is in the form of a thick black ________ which contains elements like iron and nickel. Solid Complete liquid Molten fluid None of these 23. The distance of the Earth from the sun is ________million km. 130 140 150 170 24. Beneath the oceans, the thickness of crust is about ________ km. 5 10 15 20 25. We live on the ________ of the Earth. Crust Mantle Core All of these Time is Up! Time's up
