In summer because the air in summer is less dense.
the model most likely represents the positions of earth, sun, and moon when there is: greatest difference between high and low tides
The high and low tides are created because of the combination of effects from the moon's gravitational forces with the sun's gravitational forces that affect the tide as the earth rotates
The first one, directly proportional to the length that the spring is stretched.
Mass of the displaced material. In water it would be the mass of the water that the volume of the ball displaces.
Oceanic crust is *denser* than continental crust.
oceanic crust consists mostly of rock