# Earth, Moon, and Sun

## How Does earth move in space? What causes the cycle of seasons?

Earth moves in 2 major ways in space, Rotation and revolution.

Rotation is how the earth spins. The rotation of earth causes night and day. Earth rotates east. This causes the seasons on earth because the sun hits earth differently and causes the different heat spread. Revolution is when the earth makes a full circle around the sun. The positioning of the earth while revolving causes seasons.

# Section 2

## What determines the strength of the force of gravity between two objects?

The strength of the gravity depends on the mass of the objects and the distance between the two objects. Sense the distance between the moon and earth is small the gravity is enough to keep the the objects moving closer.

## What two factors combine to keep the moon earth in orbit?

Revolution and gravity combine to keep the moon and earth in orbit. This is called inertia. The constant movement of the moon mixed with the gravity of the earth makes the moon make a circular rotation around the earth.

# Section 3

## What causes the phases of the moon?

The sun and revolution of the moon determines how we see the moon. The sun usually always shines on half on the moon, but depending on how the moon is revolving we see different parts of the moon. Therefor we see different faces of the moon because the sun is not shining on the part that we see.

## What are solar and lunar eclipses?

A solar eclipse is when the moon moves in front of the sunlight hitting earth. A lunar eclipse is when the earth moves in front of the moons sunlight.

## What causes the tides?

Tides occur because of the difference in the force of gravity from the moon on the earth. When the moon is facing a part of the earth it is high tide. When the the moon is east or west from the part where the moon is it is low tide.

# Section 4

## What features are found on the moon's surface?

The moon's surface is covered with craters, valleys, highlands, and maria. Maria are dark areas that are hardened rock formed by lava 3-4 billion years ago. Highlands are mountains or tips of craters on the moon. Craters are on the moon from constant bombardment from meteoroids from space.

## What are some characteristics of the moon?

The moon is from 130 degrees Celsius to -180.  The temperature of the moon depends on how much sunlight that side is getting. The moon has no water but may have frozen lakes in some of the craters. The moon is 3,476 kilometers in diameter. The united states is slightly bigger than the moon. Below is a location of a crater that hit earth.

## How did the moon form?

Their are many different theories about how the moon formed. One is that the moon was formed elsewhere in the solar system and then was captured by earths gravity and was pulled into orbit. Another theory is that the earth was hit by a asteroid when it was very young and the moon is part of the earth but broken off.

## Please RSVP to a moon appreciation party

17 people are going
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17 going0 maybe1 no
bwood (+4) 2 years ago

Alyssa Santora (+5) 2 years ago

I'm going

ABatista (+5) 2 years ago

im being paid to go

Seely 2 years ago

that is cool but i have decided not to go

### Comment Stream

2 years ago
0

your animation of the Earth moon and sun is really cool!

2 years ago
0

Great Job, come buy some moons from me.

2 years ago
0

lots of info, but very lame

2 years ago
0

I like it

2 years ago
0

The video was a great for visualizing how the planets move