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# Section 1: Earth in Scace

## How does Earth move in Space?

The earth moves through space in the following two ways: Revolution and rotation. Earth revolves around the sun on its axis. Earth moves along a route, or an orbit, that of which is not like a circle but an extended or elongated circular orbit.

## What causes the cycle of seasons on Earth?

The yearly cycle of seasons occurs because of the tilt on the Earth's axis as it revolves around the sun. If the Earth's axis had not had a tilt, there would not be any drastic seasons, or large differences of temperature in a certain area.

# Section 2: Gravity and Motion

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

The strength of the force of gravity between two objects depends on two factors: the masses of the objects and the distance between them. If the distance increases, then the force decreases. If the mass increases, then the force will increases as well.

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

The inertia and the force of gravity combine to keep Earth in orbit around the sun and the moon in orbit around Earth. Inertia is the tendency of an object to resist a change in motion.

# Section 3: Phases,Eclipses, and Tides

## What causes the phases of the moon?

The phases of the moon are shaped from the amount of sunlight that is shown on the moon reflecting down on Earth. These phases are shown by the position of the sun, moon, and Earth.

## What are solar and lunar eclipses?

A solar eclipse occurs when the moon passes directly between Earth and the sun, blocking sunlight from Earth. During a lunar eclipse, Earth blocks sunlight from reaching the moon. A lunar eclipse occurs at a full moon, Earth blocks sunlight from reaching the moon.

## What causes the tides?

Tides are caused mainly by differences in how much the moon's gravity pulls on different parts on Earth.  High tide lasts for about six hours and low tides last for about six hours. Spring tides is when there is an unusually high tide. This is rare and only happens when the moon is closest to earth. Neap tides occur when there is the least difference between low and high tides which happens two times a month

# Section 4: Earth's Moon

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

Maria, craters, and highlands are different types of features on the moon's surface. The moon's dark surfaces, flat area's are called maria. There are also large round pits, caused by meteoroids, are called craters. Meteoroids are chunks or dust from space. Light areas that receive more light from the sun because of craters that create rims are noted as highlands. Mountains are also classified as highlands.

## What are some characteristics about the moon?

The moon is described as dry and airless. Compared to the Earth, the moon is small and has large variations its surface temperature. There is no liquid or sign of life, though there is evidence of ice near the poles. Temperatures from 130°C to -180°C.

## How did the moon form?

Approximately 4.5 billion years ago, when Earth was fairly new, a planet sized debris had collided with Earth to form the moon. A ring was then created after the explosion, the ring formed together to create the moon we have now, it had shaped in its orbit to create the sphere-like shape it then took on.

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### Comment Stream

2 years ago
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Great Job.

2 years ago
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Thank you

2 years ago
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cool animation

2 years ago
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THX

2 years ago
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This is totally incomplete!