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ICSE-Grade4
4th Grade ICSE
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Basic Concepts
What is rotation?
The spinning of the Earth on its axis.
What is revolution?
The movement of the Earth around the Sun.
What is the axis of the Earth?
An imaginary line around which the Earth spins.
How many hours does the Earth take to complete one rotation?
24 hours.
What causes day and night?
The Earth's rotation.
Intermediate Concepts
What is the orbit?
The path the Earth takes around the Sun.
What divides the Earth into hemispheres?
The equator.
What causes the seasons?
The Earth's tilt and revolution.
How long does one revolution take?
365 days and 6 hours.
What is a leap year?
A year with 366 days.
Which direction does the Earth rotate?
West to east.
What are the two hemispheres of the Earth?
Northern and Southern.
Advanced Concepts
What is the tilt of the Earth's axis?
An angle.
What is the speed of Earth’s revolution?
30 kilometers per second.
What happens when the northern hemisphere tilts towards the Sun?
Summer.
What happens when the southern hemisphere tilts away from the Sun?
Winter.
How often does a leap year occur?
Every four years.
What is the northernmost point of Earth?
North Pole.
What is the southernmost point of Earth?
South Pole.
Basic Concepts
Intermediate Concepts
Advanced Concepts
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