How do earthquakes and volcanoes give us clues about how the Earth's crust is broken up into pieces or plates

Explain how a convection current in the earth is formed.

What was on result of the potato famine

Compare the quantity in column a with the quantity in column b. pa p a is tangent to the circle at a. column a column b ap a p ax a x question 4 options: the two quantities are equal. the quantity in column a is greater. the relationship cannot be determined from the information given. the quantity in column b is greater.