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The Earth spins around an imaginary line called its axis.As it spins, the part of the Earth facing the Sun gets light, which we call day.The part facing away from the Sun is dark, which we call night.This continuous spinning creates the cycle of day and night.
The Earth not only spins but also moves around the Sun.The Earth's axis is tilted, so different parts get more sunlight at different times of the year.When a part gets more sunlight, it's warmer, and when it gets less, it's colder.This tilt and movement cause the changes in seasons.
A leap year is a year with an extra day, making it 366 days long.The Earth takes 365 days and about 6 extra hours to go around the Sun.Every four years, those extra 6 hours add up to a whole extra day, which we add to February.This helps keep our calendar in sync with the Earth's movement.
The Earth is divided into two halves by an imaginary line called the equator.The top half is the northern hemisphere, and the bottom half is the southern hemisphere.Because of the Earth's tilt, when the northern hemisphere has summer, the southern hemisphere has winter, and vice versa.They experience opposite seasons.
Long Answers
1. How are days and nights formed on Earth?
2. What causes the change in seasons on Earth?
3. Explain what a leap year is and why we have it.
4. Describe the difference between the northern and southern hemispheres and how they experience seasons.
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