The plates of the Earth’s crust are in constant motion. Describe how this happens. HELP ME PLEASE!!!

Which system revise and send electrical signals throughout the body

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley