how long do ice ages last?

100,000 years

1 million years

10,000 years

150 years

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

Earthquake waves that vibrate from side to side and up and down only through solids are known as "seismic waves."hope my answer has you : )