Composition of the Earth

9.What happens to the temperature of the Earth as depth increases?

10.What is the crust made of?

11.Why is the inner core solid despite being hotter than the outer core?

12.What is the radius of the inner core?

13.The Earth's crust has an average thickness of 35 km. If the total radius of the Earth is 6371 km, what percentage of the Earth's radius is the crust?

14.If the mantle is 3000 km thick and the outer core is 2000 km thick, what is the total thickness of the mantle and outer core combined?

15.Which statement about the Earth's layers is correct?

16.If the Earth's crust contains 46% oxygen and 28% silicon, what is the combined percentage of these two elements?

17.A student claims that the mantle is completely solid. Based on the source, which statement best corrects this misconception?

18.What is the Earth's crust made of?

19.Which two elements are the main components of the Earth's outer core?

20.The inner core is at a temperature of 6000 °C, yet it is solid. Which statement explains this?

21.Which layer of the Earth is responsible for generating the magnetic field?

22.What is the approximate thickness of the Earth's crust?

23.Which layer of the Earth is composed primarily of iron and nickel?

24.What is the approximate thickness of the mantle?

25.A student draws a cross-section of the Earth and labels the layers. Which sequence from the surface to the centre is correct?

26.If the Earth's total radius is 6371 km and the crust has an average thickness of 35 km, what is the approximate thickness of the mantle and core combined?

27.The Earth's crust contains 46% oxygen and 28% silicon. What is the percentage of other elements combined?

28.If the Earth's radius is 6371 km and the inner core radius is 1400 km, what is the approximate volume of the inner core? (Volume of sphere = 4/3 π r³)

29.What is the approximate thickness of the Earth's mantle?

30.Which layer of the Earth is liquid?

31.What is the Earth's crust primarily made of?

32.Which element is the second most abundant in the Earth's crust?

33.The Earth's inner core is solid because:

34.What is the approximate radius of the inner core?

35.If the Earth's total radius is 6371 km and the crust thickness is 35 km, what is the combined thickness of the mantle and core?

36.Which layer of the Earth is responsible for the magnetic field?

37.Which of the following correctly lists the Earth's layers from the surface to the centre?

38.If the Earth's crust contains 46% oxygen and 28% silicon, what is the combined percentage of aluminium and iron?

39.What is the mantle made of?

40.Which layer of the Earth is the thinnest?

41.The Earth's mantle is completely solid.

42.The temperature of the Earth decreases with depth.

43.Which of the following are layers of the Earth? (Select all that apply)

44.Arrange the Earth's layers in order from the surface to the centre.

45.Match each layer to its description.

46.Match each layer of the Earth to its correct description.

47.Which of the following are true about the Earth's crust? (Select all that apply)

48.The Earth's magnetic field is generated by the inner core.

49.Which of the following is the correct order of the four most abundant elements in the Earth's crust, from most to least abundant?

50.Complete the sentence.

51.What is the radius of the inner core in km?

52.Complete the sentence: The Earth's crust is divided into different parts called ___.

53.The Earth's mantle is approximately 3000 km thick and the outer core is approximately 2000 km thick. What is the combined thickness of the mantle and outer core in km?

54.Explain why the inner core is solid even though it is hotter than the outer core.

55.What is the radius of the inner core in km?

56.The Earth's mantle is approximately 3000 km thick and the outer core is approximately 2000 km thick. What is the combined thickness of the mantle and outer core in km?