The Earth and Its Movement – Rotation, Revolution and Eclipses

THE EARTH AND ITS MOVEMENT – ROTATION, REVOLUTION AND ECLIPSES

THE EARTH AND ITS MOVEMENT 

The Earth is the planet we live on. It is round like a ball and moves in space.

The Earth has two main movements: rotation and revolution.

1. Rotation of the Earth

Rotation is the spinning of the Earth on its own axis.

It takes 24 hours (1 day) to complete one rotation. Rotation of the Earth causes day and night. The Earth rotates from west to east, which is why the sun rises in the east and sets in the west.

Example/Activity – Use a globe and a flashlight to show how one side is light (day) and the other is dark (night).

2. Revolution of the Earth

Revolution is the movement of the Earth around the Sun.

It takes 365 days (1 year) to complete one revolution. The earth’s revolution causes seasons (summer, autumn, winter, spring). The path of revolution is slightly oval-shaped, called an orbit.

Example/Activity – Use a ball (Earth) and a lamp (Sun) to show how the Earth moves around the Sun.

3. Other Effects of Earth’s Movement

Rotation → Day and night

Revolution → Seasons and change in the length of the day

The tilt of the Earth also affects the seasons.

Summary – The Earth moves in two ways: rotation, which causes day and night, and revolution, which causes seasons.

THE EARTH, THE MOON AND THE SUN

1. The Earth is the planet we live on. It is round like a ball and moves in space. The Earth has two main movements: rotation (causing day and night) and revolution (causing seasons).

2. The Moon is a natural satellite of the Earth, meaning it revolves around the Earth. It is smaller than the Earth and does not produce its own light. The Moon reflects light from the Sun, which is why we can see it at night.

Key Facts about the Moon:

Takes about 27 days to revolve around the Earth.

Causes tides in the oceans due to its gravitational pull.

Appears in phases: new moon, crescent, half moon, gibbous, full moon.

3. The Sun is a star and is the main source of light and heat for the Earth. It does not move around the Earth; instead, the Earth revolves around it.

The Sun is important for:

• Day and night

• Growth of plants (photosynthesis)

• Warmth and climate

4. Relationships Between the Earth, Moon, and Sun

Earth rotates on its axis → causes day and night.

Earth revolves around the Sun → causes seasons.

Moon revolves around the Earth → causes the phases of the Moon and tides.

The Sun, Earth, and Moon cause eclipses:

Solar eclipse → Moon blocks the Sun from the Earth.

Lunar eclipse → Earth blocks sunlight from reaching the Moon.

Summary – The Earth is a planet that rotates and revolves; the Moon is its natural satellite; the Sun is a star that gives light and heat. Together, their movements cause day and night, seasons, tides, and eclipses.