Earth's Rotation 5.8C Friday 1-22

Earth's Rotation 5.8C Friday 1-22

More on the Earth's Rotation!

Earth's Rotation

• A rotation is a spin around a center, like a top!

• Earth spins around a central line called an axis.

• Axis - Imaginary line that goes through the planet's center.

• Earth's axis is tilted 23.5 degrees.

• Earth's rotation and tilt causes day and night.

• It takes 24 hours for one rotation.

Multiple Choice

Earth spins around...

• The sun

• It's axis

• The earth isn't spinning!

• The moon

Multiple Choice

Earth is tilted at 23.5 degrees

• True

• False

Multiple Choice

Earth's rotation and tilt causes..

• The seasons to change

• Dizziness

• Day/Night

• Fake News, earth isn't spinning.

Foucault's Pendulum

• Proved that the Earth rotated on it's axis.

• Foucault hung a pendulum from a tall building in Paris, France.

• He began swinging it directly North to South, but eventually it would move slightly right.

Multiple Choice

A pendulum is...

• A really fancy pen that writes smoothly.

• A weight hung up to move freely with gravity.

• A very old man.

• Revolution

Multiple Choice

Foucault's Pendulum proved that...

• The earth rotates

• Foucault is very boring.

• Paris is a cool place to be at.

• Foucault didn't even prove anything.

Day and Night

• We experience day when our side of the earth is facing the sun.

• Different areas of the earth are experiencing day and night!

• Depending on the tilt it can even effect how long you get day time!

Multiple Choice

The area pointed at by the red arrow is experiencing..

• Summer

• Daytime

• Nighttime

• Winter

Multiple Choice

The area pointed at by the red arrow is experiencing

• Winter

• Summer

• Daytime

• Night time

Sundial

• The sun appears to move from East to West.

• The Earth is actually rotating west to east.

• When the sun is in the east, shadow will be cast to the west.

• Before Iphones people used sundials to tell time.

Multiple Choice

What does a sundial use to tell time?

• A pointy thing.

• Rocks

• Shadows

• Iphone

Earth's Revolution!

• A revolution describes the motion of the Earth around the sun.

• It takes 365 days to complete one full revolution.

• Revolutions cause the seasons

• Revolutions = seasons, Rotation = day/night

Multiple Choice

The revolution of the Earth around the Sun causes day and night.

• True

• False

Multiple Choice

How long does it take to complete a revolution?

• A day

• A month

• A year

• We already won the revolution.