plate tectonics

Question 1

divergent boundary

Answer 1

a boundary along which two tectonic plates move apart characterized by either a mid-ocean ridge or a continental rift valley

Question 2

convergent boundary

Answer 2

a boundary along which two tectonic plates push together characterized by either subduction or continental collision

Question 3

transform boundary

Answer 3

a boundary along which two tectonic plates scrape past each other and the crust is neither formed nor destroyed

Question 4

rift valley

Answer 4

a deep valley formed as tectonic plates move apart such as along the mid-ocean ridge

Question 5

contiental drift

Answer 5

the hypothesis that Earths continents move on earths surface

Question 6

lithosphere

Answer 6

the layer of Earth made up of the crust and the rigid rock of the upper mantle

Question 7

asthenosphere

Answer 7

the layer in Earths upper mantle and directly under the lithosphere in which rock is soft snd weak because it is close to melting

Question 8

convection currents

Answer 8

a circulation patter in which material is heated and rises in one area and cools and sinks in another area

Question 9

Theory of plate tectonics

Answer 9

a theory of stating that earths lithosphere is broken into huge plates that move and change in size over time