Which of the following is part of North America? Argentina
Greenland
Mexico
Antarctica
U. S.A
Japanese Islands
Central America
Iceland
Caribbean Islands
Canada

Is water wet? and is fire on fire?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

On nights when we see the new moon phase, what side of the moon are we seeing?