What is the most common element (by mass) forming the planet Earth?

carbon

oxygen

iron

silicon

Iron is most abundant in the Earth's outer and inner core, and it is the fourth most common element in the Earth's crust.

globalquiz.org

astronomychemistryEarthelementsgeologytechnology

Elements quiz Earth quiz Geology quiz

You will play as

Answers by country

France

25%

56%

12%

Greece

27%

50%

16%

Pakistan

16%

25%

46%

10%

India

17%

24%

44%

12%

452

Malaysia

22%

44%

11%

Switzerland

29%

41%

23%

the Philippines

23%

37%

16%

the United States

32%

18%

34%

14%

550

Unknown

30%

16%

32%

16%

Australia

37%

15%

31%

15%

the Netherlands

43%

12%

31%

Canada

30%

20%

30%

17%

Republic of Ireland

33%

22%

27%

16%

Nigeria

14%

52%

26%

Poland

29%

22%

24%

23%

7864

the United Kingdom

40%

19%

24%

14%

161

Germany

19%

33%

23%

286

Austria

15%

45%

22%

15%

Ghana

28%

21%

14%

Indonesia

23%

53%

15%

Which desert has this famous "eye"?

Which of the following European mountain ranges will rise the most in the next century?

Carpathian Mountains

Alps

Pyrenees

Scandinavian Mountains

This kind of tilted forest is a common sight in subarctic taiga. What is this phenomenon caused by?

Stars of which type are the smallest in diameter?