Question

watch: crash course eclipses video link (tides): https://www.youtube.com/watch?v=kimwpfltlfb
complete either the modified, regular, or honors questions based on the video. you can delete the ones you do not have to do.
modified assignments answer these questions. use red font.

1. what is the definition of a tidal force?
2. how many high and low tides occur each day on earth?
3. name the two objects that primarily influence earth’s tides.
4. what is the distance between the earth and the moon?

Explanation:

1. What is the definition of a tidal force?

A tidal force is the differential gravitational force exerted by a celestial body (like the Moon or Sun) on another body (like Earth). It causes stretching or deformation, and is responsible for phenomena like tides. The force varies with distance, so different parts of the affected body experience slightly different gravitational pulls, leading to tidal bulges.

Due to the Earth's rotation and the gravitational interaction with the Moon (and to a lesser extent the Sun), most coastal areas experience two high tides and two low tides every lunar day (about 24 hours and 50 minutes). The lunar day is longer than a solar day because the Moon orbits Earth in the same direction Earth rotates.

The two main objects influencing Earth’s tides are the Moon and the Sun. The Moon has a stronger tidal influence because it is much closer to Earth than the Sun, even though the Sun is more massive. The gravitational pull of both bodies creates tidal bulges, with the Moon’s effect being about twice as strong as the Sun’s.

Answer:

A tidal force is the differential gravitational pull exerted by a celestial body (e.g., Moon, Sun) on another body (e.g., Earth), causing stretching/deformation (and tides), due to varying gravitational strength across the affected body.

2. How many high and low tides occur each day on Earth?