Question

58 multiple choice 1 point
what compositional layers of earth make up the lithosphere?
the crust and lower mantle
the upper and lower mantle
the crust and upper mantle
the continental crust and oceanic crust
59 multiple choice 1 point
if the mantle of our planet was more solid and did not move around what is the likely outcome?
the planet’s temperature would decrease
the earth would continue like normal
there would be no tectonic plate movement
the planet would stop rotating
60 multiple choice 1 point
the movement of hotter matter rising and cooler matter sinking due to differences in density is called?
plate tectonics
convection
viscous
currents

Explanation:

Question 58

The lithosphere is defined as the rigid outer layer of the Earth, which consists of the crust and the upper part of the mantle (the asthenosphere is below, but lithosphere includes crust + upper mantle). The other options are incorrect: crust + lower mantle is wrong, upper + lower mantle is the mantle only, and continental + oceanic crust is just crust, not including upper mantle.

Tectonic plate movement is driven by mantle convection (movement of mantle material). If the mantle were more solid and didn't move, there would be no convection to drive plate movement. A temperature decrease isn't directly linked, Earth can't continue normal (plates move due to mantle), and mantle movement doesn't affect planet rotation.

Convection is the process where hotter (less dense) material rises and cooler (more dense) material sinks, transferring heat. Plate tectonics is about plate movement, viscous is a property, and currents are more general (convection currents are a type, but the process here is convection).

Answer:

The crust and upper mantle

Question 59