Question

8.) which force pushes plates together?
a.) tension b.) compression c.) shearing d.) isostasy
9.) which force occurs where earths plates are moving apart?
a.) tension b.) compression c.) shear d.) isostasy
10.) which layer of earth is thought to be solid and composed mostly of metal iron?
a.) crust b.) mantle c.) outer core d.) inner core
11.) which suggests that earths lithosphere floats on the asthenosphere?
a.) tension b.) compression c.) shear d.) isostasy
12.) how is energy from an earthquake carried through the ground?
a.) isostasy b) seismic waves c.) sound

Explanation:

• For question 8: Compression is the force that pushes plates together. Tension pulls apart, shearing slides past, and isostasy is about balance.
• For question 9: Tension occurs when plates move apart. Compression pushes together, shear slides, and isostasy is balance.
• For question 10: The inner core is solid and mostly iron. The crust is the outer layer, mantle is below crust, outer core is liquid.
• For question 11: Isostasy suggests the lithosphere floats on the asthenosphere. Tension, compression, and shear are forces acting on plates.
• For question 12: Energy from an earthquake is carried by seismic waves. Isostasy is balance, sound is not relevant here.

Answer:

1. B. compression
2. A. tension
3. D. inner core
4. D. isostasy
5. B. seismic waves