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7th Grade Mrs. Hook science test

1. Revolution 2. Tilt of the Earth's Axis

What causes seasons on Earth

Spinning on axis

Rotation

One object going around another

Revolution

About 24 hours

How long does it take for the earth to make one rotation?

365 1/4 days

How long does it take fot the earth to make one revolution?

counter - clockwise for both

Which way does the earth rotate? Revolve?

Summer- 93 million miles

During which season is the earth farthest from the sun? How far away is it?

1/6 of the earth gravitational pull

How much gravitational pull does the moon have?

1/4 of the earth's size

What size is the moon compared to the earth?

27.3 days

How long does it take for the moon to make one rotation?

27.3 days

How long does it take for the moon to make one revloution?

29.5 days

How long is the moon phases cycle?

The earth is moving around the sun (revolving) at the same time.

Why does it take two extra days for the moon phase cycle as compared to the revolution

Studied the moon's surface, gets credit for inventing the telescope, observed planets Venus, mares and jupiter

What are Galileo's accomoplishments?

Maria are low lands on the moons surface called Seas. Formed from volcanic lava flows in past

What are Maria? How did they probably form?

Craters: are deep pits in the surface of the moon. They are formed by Meteor impacts

What are Craters? How did they probably form?

The theory that states the moon may have formed when a huge meteor or asteroid hit the earth

Impact Theory?

The theory that states the moon may have been captured by the earth's gravitational pull

Capture Theory?

The Theory that states the moon formed in the same dust and gas cloud as the earth.

Condensation

Tides are the rise and fall of the oceans water. The gravitational pull of the moon and sun is the cause.

Tides

Neap tide is when the sun, moon and Earth are at a right angle to each other (quarter Phases) and the pull of sun and moon cancel out. Tide range is much less than normal.

Neap Tide

Bigger range in tide levels. Higher high tide, lower low tide. Moon and sun's gravitational pull add together.

Spring Tides

The process that creates the energy for the sun.

Nuclear Fusion

Hydrogen 75% and Helium 24%

What two gases make up the majority of the sun?

The core

Where does nuclear Fusion take place?

Darker spots on the surface (photosphere) of the sun. They are cooler.

Sunspots

An explosion of hydrogen gas from the sun's surface that occurs when loops in sun spot regions suddenly connect and are ejected into space

Solar Flares

New moon

What phase is the moon in during a solar eclipse?

Umbra

What shadow would have to reach you in order to see a total solar eclipse?

Full Moon

What phase is the moon in during a lunar eclipse?

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