EARTHS ROTATION AND REVOLUTION Earths Rotation Rotation is

Earth’s Rotation • Rotation is the spinning of the Earth on its axis. •

Earth’s Revolution • A revolution occurs as the earth moves around the sun. •

Earth’s Orbit • The path an object takes as it revolves around another object.

Around and Around We Go • Every second, that you sit in this classroom,

1. The Earth spinning on its axis. Rotation Revolution 2. Going around a larger

Identify the motion being shown in each of these pictures. Each team must write

We know that the reason we have day and night is because the Earth

But guess what! Rotating isn’t the only way the Earth moves in space! The

How long does one revolution take? It takes the Earth one year, or 365

All over the world, people experience the four seasons.

But why do we have four seasons? It’s because the Earth’s axis is tilted.

Look at this diagram. Notice how the Earth is always tilted in the same

During part of the year the North Pole tilts summer towards the sun. This

During another part of the year, the North Pole winter points away from the

When it is summer in North America, we are tilted towards the rays of

When it is winter in North America, we are tilted away from the sun’s

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EARTH'S ROTATION AND REVOLUTION

Earth’s Rotation • Rotation is the spinning of the Earth on its axis. • The time for one rotation is 24 hours. • The spinning of earth on its AXIS – the imaginary line through the planet from the North Pole to the South Pole – is its rotation • The axis of the earth is tilted 23. 5° Click image to view Earth’s rotation.

Earth’s Revolution • A revolution occurs as the earth moves around the sun. • Time for one revolution = 365 1/4 days = 8, 766 hours

Earth’s Revolution

Earth’s Orbit • The path an object takes as it revolves around another object.

Around and Around We Go • Every second, that you sit in this classroom, the Earth's orbital motion carries you about 18 miles through space.

1. The Earth spinning on its axis. Rotation Revolution 2. Going around a larger body. Rotation Revolution 3. 24 hours. Rotation Revolution 4. Causes the Earth’s seasons. Rotation Revolution 5. Creates a year. Rotation Revolution 6. The moon going around Earth. Rotation Revolution

Identify the motion being shown in each of these pictures. Each team must write their answers for each figure in the form of a question. Figure #1 Rotation Planet Figure #2 Rotation Revolution Earth Revolution

What Causes Seasons?

We know that the reason we have day and night is because the Earth rotates. Rotate means to turn. The Earth rotating on its ______ axis gives us day and night. Earth’s axis is the imaginary line that goes through the center of the Earth.

But guess what! Rotating isn’t the only way the Earth moves in space! The Earth also revolves. Revolve – When one object moves around another object

How long does one revolution take? It takes the Earth one year, or 365 ¼ days to orbit the sun. Does anyone know what orbit means? Orbit The path that an object follows as it revolves around another object.

All over the world, people experience the four seasons.

Winter…

Spring…

Summer…

and fall.

But why do we have four seasons? It’s because the Earth’s axis is tilted. Take a good look at our globe. It‘s not tilted like that because it looks nice. No way. That’s the way the Earth is tilted in space. That tilt gives us seasons!

Look at this diagram. Notice how the Earth is always tilted in the same direction. As the revolves the part of Earth tilted Earth _____ toward the sun changes.

During part of the year the North Pole tilts summer towards the sun. This season is ____.

During another part of the year, the North Pole winter points away from the sun. This season is ______.

When it is summer in North America, we are tilted towards the rays of the hot, bright sun. Sun’s rays N S

When it is winter in North America, we are tilted away from the sun’s rays. N Sun’s rays S