16. The ground beneath our feet is indeed still.
A. Right
B. Wrong
C. Not mentioned
17. The shape of lands and oceans are slowly changed with the movements of plates.
A. Right
B. Wrong
C. Not mentioned
18. Earth cooled down shortly after it was formed.
A. Right
B. Wrong
C. Not mentioned
19. Scientists once estimated that Earth's crust started shifting three billion years ago.
A. Right
B. Wrong
C. Not mentioned
20. It took a long time for the melted crust to become hard.
A. Right
B. Wrong
C. Not mentioned
21. The formation of the Isua supracrustal belt is thought to have started about 3.8 billion years ago.
A. Right
B. Wrong
C. Not mentioned
22. The lsua supracrustal belt is now a popular holiday resort.
A. Right
B. Wrong
C. Not mentioned