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Std 5 science unit 11
 

Std 5 science unit 11

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    Std 5 science unit 11 Std 5 science unit 11 Presentation Transcript

    • Earth is a beautiful planet in our solar system. The Earth’s natural satellite is the Moon. The Earth and the Moon move around the Sun.
    • Earth is our planet and it is the third planet from the Sun. It rotates on its axis from the west to the east. It takes 24 hours or one day to make one complete rotation. An axis is an imaginary line that connects the North and South Poles.
    • The Earth does not only rotate on its axis. It also moves around the Sun at the same time. It takes one year to move around the Sun.
    • The Moon also rotates on its axis. It takes about 28 days to make one complete rotation. At the same time, the Moon moves around the Earth. It also takes about 28 days to move around the Earth.
    • The Sun is the centre of our solar system. The Earth and the Moon move around the Sun at the same time.
    • Morning Noon AfternoonThe Sun appears low in the early morning and late afternoon. This makes the shadow longer in the early morning and late afternoon than at noon.
    • daytime night-timeThe part of the Earth that is facing the Sun experiences daytime. Meanwhile, the part of the Earth that is facing away from the Sun experiences night-time.
    • Day and night occur due to the rotation of the Earth on its axis.
    • The Moon is the brightest object in the night sky. However, it does not emit light. The Moon appears bright at night because it reflects light from the Sun to the Earth
    • From the Earth, the Moon looks like it is changing its shape. Actually it is not. It is cause by the different positions of the Moon that we see from the Earth. This is called the phases of the Moon. There are four major phases of the Moon.