1.) what kind of evidence do scientists use to locate boundaries of plates and interpret what type of boundary is present?
a.) matching fossil records
b.) similar rock layers
c.) distribution of earthquakes and volcanoes
d.) the way the continental coastlines fit together like a puzzle

2.) scientists knew that earth was not getting bigger as new crust was formed at the ridges. what did the discovery of oceanic trenches scientists understand?

a.) that the crust was made of 9 tectonic plates
b.) that the crust could be created and destroyed
c.) that the crust was made of a plastic-like substance
d.) that the crust was thicker in some places than in others

3.) most earthquakes and volcanoes on earth occur in the atlantic ocean along the ring of fire.

true
false