1.) A convection current is caused by differences in temperature resulting to variation in?a. air pressure b.color c.density d.mass

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1.) A convection current is caused by differences in temperature resulting to variation in?a. air pressure
b.color
c.density
d.mass

2.) Scientists believe that the motion of tectonic plates is caused by

a. pressure in earth's crust
b.conveyor belts
c.convection currents
d.heat in the earth's core

3.) It is a measure of how much mass there is in a volume of a subtance.

a. volume
b. temperature
c. density
d. mass

4.) Hot molten materials in a convection cell rises near the

a. outer core
b. crust
c. inner core
d. mantle

5.) The idea that earth's lithosphere is broken up into seperate plates that float on the mantle is the theory of

a. continental drift
b. seafloor spreading
c. tectonic movement
d. plate tectonics

6.) The region in which one plate moves under another is

a. rift valley
b. subduction zone
c. magma chamber
d. vent

7.) The motion of gas or liquid caused by differences in temperature is a

a. tectonic movement
b. plate tectonic
c. convection current
d. magma chamber

8.) A driving force for plate motion at mid-ocean ridges as a result of the rigid lithosphere sliding down

a. slab pull
b. ridge push
c. convection current
d. seafloor spreading

9.) The process of one plate moving under another plate is called

a. drifting
b. plate tectonics
c. seafloor spreding
d. subduction

10.) Tectonic plates ride on

a. inner core
b. asthenosphere
c. outer core
d. lithosphere

11.) The region where old crust melted back into magma is

a. along plate boundaries
b. at the mid-ocean ridge
c. at deep-sea trenches
d. volcano

12.) Which of the following is not a method of heat transfer?

a. condensation
b. convection
c. conduction
d. radiation

13.) The plastic-like upper portion of the mantle is called

a. the magma
b. the core
c. the lithosphere
d. the asthenosphere

14.) Which of the following is not a driving force of tectonic plates?

a. ridge push
b. slab push
c. drag force
d. mantle convection

15.) What is the source of heat in a mantle convection current?

a. the sun
b. the crust
c. the core

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