Gravity and Tidal Forces Concepts

What do we call the regular rising and falling of ocean water levels?

• Waves

• Currents

• Tides

• Storm surges

Many people believe that the Moon's gravity pulls ocean water, creating bulges on the side of Earth closest to it. What is the problem with this explanation?

• It only explains one bulge, not two.

• It doesn't explain why the Moon orbits Earth.

• It's only true for freshwater.

• It's a complete myth.

What is the invisible force that pulls any two objects with mass towards each other?

• Friction

• Magnetism

• Gravity

• Buoyancy

Which famous scientist developed the law that explains how gravity works between any two objects in the universe?

• Albert Einstein

• Galileo Galilei

• Isaac Newton

• Stephen Hawking

How does the strength of gravity change between two objects as they move closer to each other?

• It gets weaker

• It stays the same

• It gets stronger

• It disappears

If you apply the same amount of force to a small object and a large object, which object will speed up more?

• The large object

• The small object

• Both will speed up the same amount

• Neither will speed up

If a heavy ball and a light feather are dropped at the same time in a place with no air, what will happen?

• The heavy ball will hit first

• The light feather will hit first

• They will hit at the same time

• The feather will float away

What is the name for the force that causes planets to change shape and creates the ocean tides?

• Magnetic force

• Tidal force

• Wind force

• Centrifugal force