The Reasons for Seasons

By: Hannah Krueger

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What causes day and night on Earth?

Day and night are cause by Earths rotation.

What is Earth’s rotation on its axis and how long does it take the Earth to rotate once?

When Earth rotates on it's axis it means that it is spinning on it's axis. Also, it takes 24 hours for one complete rotation.

What is Earth’s revolution around the Sun and how long does one revolution take?

When the Earth revolves around the sun, it just means that the erath is orbiting the sun. Also, it takes 365.25 for one full revolution around the sun.

What are the two reasons we have seasons on Earth?

One of the two reasons we have seasons on Earth is because the Earths axis is tilted 23.5 degrees. The seccond reason is because of the amount of direct sunlight that is shown upon the Earth. The more direct sunlight shining on the Earth the warmer it is.

What is the difference between seasons in the northern and southern hemispheres?

The seasons are the opposite. For example when the Nortthern Hemisphere is Spring, the Southern would be Fall, and vice versa. Also when the Northern hemisphere is Summer the Southern Hemisphere would be winter and vise versa.

Where on Earth does not experience changes in seasons and why?

At the equator because there is not a change in the angle of sunlight.

What is the difference in the length of days between our summer and winter months?

Our days in the summer months have more daylight, where in the winter months, we have less daylight and more nighttime.

What are the winter and summer solstices and when do they occur?

The summer solstice is on June 21st, and it means that it has the most sunlight all the days of the year. The winter silstice is December 21st, and it is when there is the least amount of sunlight in the whole year.

What are the spring and fall equinoxes and when do they occur?

The spring equinox is March 21st and the fall equinox is september 21st. This is when both hemispheres are the same distance from the sun, getting the same amount of sunlight because the earths axis is perpindicular to the sun.

How long are the days at the North and South Poles during their summer months and why?

The days are still 24 hours long but there is 24 hours of daylight and no darkness for 6 months and vice versa with darkness.

How long are the days throughout the year at the equator and why?

Near the Equator there is little distinction between summer, winter, autumn, or spring, but each day has about 12 hours of daylight and 12 hours of night time.

What would it be like if the Earth was not tilted on its axis?

If the Earth was not tilted on its axis, we would not have seasons. This is because there is not more or less direct sunlight at any time in the year it would be like an equinox every day!

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