How do earthquakes form?

When rocks underground suddenly break apart. It causes seismic waves that make the ground shake, making an earthquake occur.

Earthquakes occur along the margin as a result of the plates grinding together, but no major landforms are made. As the plates move apart lava erupts into the ocean cooling and forming new crust. This can also form ocean ridges where the lava that comes up cools and turns into underwater mountains. Earthquakes happen when the boundaries of the Earth's tectonic plates bump and slide past one another; sometimes, they get stuck on jagged edges and cause earthquakes once they are released. These earthquakes are always followed by aftershocks starting from the same epicenter.

Hope this helps!

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.