DAY/NIGHT & SEASONS

How long does it take the Earth to revolve around the Sun?

365 days.

Equator

A made-up line that circles the Earth halfway between the North and South Poles.

Axis

An imaginary line through the center of an object. As the Earth moves, its axis is tilted. The Sun's light hits the Earth in different ways at different times of year.

What Causes Day and Night?

Earth turns. This makes the Sun's place in the sky change during the day. As Earth turns, the Sun appears to go up and move across the sky, and then go back down.

In which direction does the sun appear to move across the sky?

East to West.

When is it Summer/ Winter in the Northern Hemishpere

In June it is tilted toward the Sun. It gets a lot of light, so it is summer. In December it is tilted away from the Sun. It doesn't get a lot of light, so it is winter.

When is it Summer/ Winter in the Southern Hemishpere

In June it is tilted toward the Sun. It gets a lot of light, so it is summer. In December it is tilted away from the Sun. It doesn't get a lot of light, so it is winter.

If it is morning in California what time is it in Greece?

Night Time.

Season

One of the four parts of the year - spring, summer, fall and winter. The tilt of the Earth's axis makes the seasons change.

What are the four seasons?

Spring, Summer, Fall and Winter

Where is the Sun in the Sky - Noon

Sun is high in the sky, straight overhead. Shadows are short.

Where is the Sun in Sky - Early Morning

Sun is low in the sky in the east. Long shadows point away from the Sun.

Where is the Sun in Sky - Later Afternoon

Sun is low in the sky in the west. Long shadows point away from the Sun.

What are the two factors that cause seasons to change?

The Earth's tilt and revoluation.

Does the Sun or Earth's rotation cause day and night?

The earth rotates on its axis causing day and night.

Northern Hemisphere

The half of the Earth that is closer to the North Pole. In June it is tilted toward the Sun. It gets a lot of light, so it is summer. In December it is tilted away from the Sun. It doesn't get a lot of light, so it is winter.

Southern Hemisphere

The half of the Earth that is closer to the South Pole.

Revolve

To move in a path around another object. It takes one year for Earth to revolve around the Sun one time. The path takes is in the shape of a flat stretched circle.

Rotate

To turn on an axis.