rocks and minerals

which is the best definition for Geosphere?

• the outer layer of the earth containing rocks and minerals

• the surface and interior of the Earth, rocks, minerals, and landforms

• the sphere of all of the gases on Earth that protect it from solar radiation

• the layer of liquid magma under Earth's core

what are the three layers of the geosphere?

• crust

• mantle

• core

• slope

Water covers

________ % of Earth's surface

true or false: our atmosphere is mostly made of Nitrogen

• true

• false

oceanic crust is different from continental crust because

• it is thinner

• it is more flexible

• it is more dense

• it forms the ocean floors

• all of the above

select the best definition for continental shelves

• steep inclines that extend from the edge to flat abyssal plains

• the submerged (underwater) edges of a continent

• steep valleys carved by a river or produced by cracks in the continential crust

abyssal plains are:

• flat areas that occupy most of the ocean floor

• deep narrow underwater depressions

• inactive underwater volcanoes with flat tops located deep under the ocean

• curved chains of islands of volcanic origin

True or false: Minerals are solids composed of one or more chemical elements

• true

• false

True or false: rocks can consist of one mineral

• true

• false

true or false: Rocks usually don't consist of more than one material

• true

• false