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week 29 session 3
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  • The first answer in the multiple choice question must be the correct answer.

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Q Study the opposite figure, then choose the correct answer from those between brackets : 3 ....... has the lowest gravity force. (The Sun - The Earth - The moon)
The moon
Study the opposite figure, then choose the correct answer from those between brackets : 2. ...... has the smallest size. (The Sun -The Earth -The moon)
The moon
Study the opposite figure, then choose the correct answer from those between brackets : 1. ...... has the largest mass. (The moon - The Sun - The Earth)
the sun
What happens to ...? • The gravity of the Sun if its mass decreases than it is now.
gravity of the Sun will decrease.
Give reasons for :Stars appear bright in the sky at night.
Because stars produce light
Give reasons for :Atmosphere limits the using of some telescopes to see distant celestial bodies.
Because atmosphere allows some light waves to pass to the Earth and blocks others.
Give reasons for : The Sun looks much larger to us than other stars.
Because the Sun is the closest star to Earth.
The Earth is surrounded by ........ that allows some light waves to pass through it and blocks others.
atmosphere
The Sun is made up of superhot gases most of them are ...... and..........
hydrogen - helium
Although the Sun is a ............ sized star it looks to us much larger.
medium
The great gravity force of .......... keeps the eight planets In their fixed orbits.
the Sun
The solar system contains eight ......... and more than 200 .............
planets - moons
The Sun produces ............ energy that warms the Earth
thermal
The Sun Is the star that locates in the center of ............
the sotar system.
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