describe three different ways that density and/or density differences play a role in plate tectonics?

Eastern europe and parts of northern europe have which of the following climates?

What can you learn about precipitation levels in south america from this map? brazil is experiencing a drought. it rains more in higher altitudes. peru received the highest level of rain. venezuela got less than 25 cm of rain. 

What mountain peak is farthest from the center of the earth