pleaseeee help mee :')


Along which features does seafloor spreading occur?

fault lines

ocean basins

ocean trenches

mid-ocean ridges




Why is no land created or destroyed at transform boundaries?

because magma rushes into gaps at these boundaries

because the plates crumble into each other at these boundaries

because the plates are more dense at these boundaries

because the plates only slip past each other at these boundaries



Which features do most stratovolcanoes and cinder cone volcanoes have in common?

broad base with quiet eruptions

violent eruptions and thin, flowing lava

wide dome shape and thick lava

steep sides and violent eruptions


Ocean trenches form over millions or billions of years. Which statement accurately describes how ocean trenches form?

a plate of continental crust collides with another plate of continental crust

two plates of continental crust slide past each other

a plate of oceanic crust is subducted under a plate of continental crust

two plates of oceanic crust pull away from each other


Geologists observed signs of widespread ancient glaciers from the same time period in areas across South America, Africa, Antarctica, India, and Australia. What theory did this observation support?

Most of Earth was once covered in a vast ice sheet.

Glaciers were once more common than they are today.

Those continents were once together as one supercontinent.

Earth was much farther than the sun than it is today.


Which statement identifies a major reason for the subduction that helps to form volcanoes?

the unusually high temperature at hotspots

the difference in density of oceanic and continental plates

the upwelling of magma between diverging plates

the release of hot ash and steam in a pyroclastic flow