The Earth and Its Movements
ICSE · Class 4 · Social Science
Summary of The Earth and Its Movements for ICSE Class 4 Social Science. Key concepts, important points, and chapter overview.
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Overview
The Earth is always moving, and these movements are very important for life on our planet. There are two main ways the Earth moves: rotation and revolution. These movements cause day and night, and also change the seasons throughout the year. In this chapter, we learn how the Earth spins on its axis
Key Concepts
The Earth rotates around an imaginary
The Earth rotates around an imaginary line called its axis. This line runs from the North Pole to the South Pole and is slightly tilted.
Rotation is the spinning of
Rotation is the spinning of the Earth on its own axis. It takes about 24 hours to complete one rotation, which causes day and night.
Revolution is the movement of
Revolution is the movement of the Earth around the Sun in an elliptical orbit. It takes 365 days and 6 hours to complete one revolution.
Due to the Earth's tilted axis
Due to the Earth's tilted axis, different parts receive direct sunlight at different times of the year. This causes summer, winter, spring, and autumn
Learning Objectives
- Explain the Earth's axis and identify it on a diagram
- Describe rotation and revolution of the Earth
- Understand how day and night are caused
- Explain how seasons occur due to the Earth's tilt and revolution
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