Tides

Front

Gravity is a force, and it weakens with _____

Back

distance

Front

When calculating gravity, we measure from _____

Back

the center of mass of an object

Front

Right now, how far are you from the center of the Earth?

Back

about 6,400 km

Front

The change in the force of gravity over distance is what astronomers call _____

Back

the tidal force

Front

The overall effect of the tidal force is to _____

Back

stretch an object

Front

Compared to the center, the side of Earth facing the Moon feels a _____ pull toward the Moon

Back

stronger

Front

Where the tidal force is strongest, we say it's _____

Back

high tide

Front

Where the tidal force is weakest, we say it's _____

Back

low tide

Front

What is the time between high tide and low tide?

Back

about 6 hours

Front

There are two high tides and two low tides every _____

Back

day