Divergent plate boundaries are when plates collide

move past each other

move apart

Positrons are spontaneously emitted from the nuclei of

This is the number of complete movements of a wave per second.

Gravity is pulling an object into the sun. the closer the object gets to the sun, the greater the gravitational force that acts on the object, increasing its acceleration. a line graph plotting the speed of the object against time would have which shape? a: straight line of positive slope b: curved line that slopes upward c: curved line that slopes downward d: straight line of negative slope