Question

directions: choose the best answer for each question.

1. the theory that earths lithosphere is divided into moving plates is called:

a. continental drift b. plate tectonics
c. seafloor spreading d. earthquake theory

1. what layer of earth do tectonic plates float on?

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

1. the rigid outer layer of the earth that includes the crust and upper mantle is the:

a. lithosphere b. biosphere
c. hydrosphere d. atmosphere

1. at which type of boundary do plates move away from each other?

a. convergent b. transform
c. divergent d. subduction

1. when two continental plates collide, they often form:

a. volcanoes b. mountains
c. ocean trenches d. rift valleys

1. the process where one plate sinks beneath another into the mantle is called:

a. subduction b. convection
c. divergence d. compression

1. the movement of molten rock inside the mantle that drives plate motion is caused by:

a. convection currents b. radiation
c. friction d. seismic waves

1. the supercontinent that once contained all earths landmasses was called:

a. laurasia b. gondwana
c. pangaea d. eurasia

1. evidence for plate movement includes:

a. fossil similarities b. rock formations
c. gps data d. all of the above

1. earthquakes most often occur:

a. in the middle of plates b. at plate boundaries
c. near volcanoes only d. under the ocean floor

1. which boundary involves plates sliding past each other horizontally?

a. divergent b. convergent
c. transform d. subduction

1. which layer of earth is liquid and made mostly of iron and nickel?

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

1. the crust and upper mantle together form the:

a. biosphere b. lithosphere
c. hydrosphere d. atmosphere

1. a chain of underwater mountains formed at divergent boundaries is called a:

a. rift valley b. mid-ocean ridge
c. trench d. volcano

1. which sphere includes all water on earth?

a. atmosphere b. geosphere
c. hydrosphere d. biosphere

1. which sphere contains all living things?

a. biosphere b. hydrosphere
c. geosphere d. atmosphere

1. which sphere includes all rocks, minerals, and landforms?

a. biosphere b. geosphere
c. hydrosphere d. lithosphere

1. which sphere contains the gases that surround earth?

a. lithosphere b. geosphere
c. atmosphere d. biosphere

Explanation:

1. Plate Tectonics is the theory that Earth's lithosphere is divided into moving plates.
2. Tectonic plates float on the asthenosphere.
3. The lithosphere includes the crust and upper mantle.
4. At divergent boundaries, plates move away from each other.
5. When two continental plates collide, they often form mountains.
6. Subduction is the process where one plate sinks beneath another into the mantle.
7. Convection currents drive plate motion.
8. Pangaea was the supercontinent that once contained all Earth's landmasses.
9. Evidence for plate movement includes fossil similarities, rock formations, and GPS data.
10. Earthquakes most often occur at plate boundaries.
11. Transform boundaries involve plates sliding past each other horizontally.
12. The outer core is liquid and made mostly of iron and nickel.
13. The crust and upper mantle together form the lithosphere.
14. A chain of underwater mountains formed at divergent boundaries is called a mid - ocean ridge.
15. The hydrosphere includes all water on Earth.
16. The biosphere contains all living things.
17. The geosphere includes all rocks, minerals, and landforms.
18. The atmosphere contains the gases that surround Earth.

Answer:

1. B. Plate Tectonics
2. C. Asthenosphere
3. A. Lithosphere
4. C. Divergent
5. B. Mountains
6. A. Subduction
7. A. Convection Currents
8. C. Pangaea
9. D. All of the above
10. B. At plate boundaries
11. C. Transform
12. C. Outer Core
13. B. Lithosphere
14. B. Mid - Ocean Ridge
15. C. Hydrosphere
16. A. Biosphere
17. B. Geosphere
18. C. Atmosphere