Chapter-Chapter 12. Earth, Moon and the Sun Science Curiosity class 7 in english Medium CBSE Notes

Chapter 12: Earth, Moon and the Sun

Definitions:

Rotation: Rotation is the movement of the Earth on its axis.

Revolution: Revolution is the movement of the Earth around the Sun in its orbit.

Axis: Axis is an imaginary line passing through the centre of the Earth.

Orbit: Orbit is the path followed by the Earth while revolving around the Sun.

Day and Night: Day and night are caused due to the rotation of the Earth.

Seasons: Seasons are caused due to the tilt of the Earth’s axis and its revolution around the Sun.

Satellite: A satellite is a body that revolves around a planet.

Moon: The Moon is the natural satellite of the Earth.

Phases of the Moon: The different shapes of the Moon seen from Earth are called phases of the Moon.

Constellation: A constellation is a group of stars forming a pattern in the sky.

Pole Star: The Pole Star is a star that appears fixed in the sky and helps in finding direction.

Solar Eclipse: A solar eclipse occurs when the Moon comes between the Earth and the Sun.

Lunar Eclipse: A lunar eclipse occurs when the Earth comes between the Sun and the Moon.

Quick Revision Points:

• Earth rotates on its axis causing day and night.
• Earth revolves around the Sun causing seasons.
• The Moon is the Earth’s natural satellite.
• The Moon reflects sunlight.
• Phases of the Moon repeat every month.
• Stars are self-luminous bodies.
• Constellations form patterns in the sky.
• Pole Star helps in finding north direction.
• Solar eclipse occurs during new moon.
• Lunar eclipse occurs during full moon.
• Eclipses are natural phenomena.

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