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15
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Give reasons for : clear limewater is used to detect the presence of carbon dioxide gas .
Because clear limewater turns into milky when carbon dioxide gas passes through it
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10
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What happens when ...? There is no oxygen in the atmosphere .
Living organisms cannot respire , so they will die
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10
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Importance of use : Dendrites :
They are connected to the neighbouring neurons to form synapse
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10
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Give reasons : The main source to prepare nitrogen is the air ?
Because nitrogen form 78% of the volume of atmosphere .
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10
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Define nervous system :
It is a communication and controlling body system
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what happens when : The cerebellum is shocked hardly .
The body will lose its balance .
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heart
Other team wins 25 points!
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magnet
Take 5 points!
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shark
Other team loses 15 points!
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lifesaver
Give 25 points!
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monster
Reset all scores!
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seesaw
Swap points!
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gift
Win 20 points!
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lifesaver
Give 25 points!
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15
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Give reasons for : Oxy-acetylene flame is used for cutting and welding metals .
Because the temperature of oxy-acetylene flame reaches 3500 c which is sufficient to cut or weld metals
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10
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Define the atmosphere
It is a mixture of different gasses surrounding the earth .
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lifesaver
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magnet
Take 10 points!
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fairy
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25
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lifesaver
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10
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Important of use Limewater :
It is used to detect the presence of carbon dioxide gas .
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10
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Define ozone ?
A gas that its molecule is composed of three oxygen atoms .
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15
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What happens when : There is no the atmosphere .
The ultraviolet radiations will reach the earth from the outer space , so the temperature of the earth will be variable
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10
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Define slightly movable joints ?
They are joints that allow movement in one direction only .
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monster
Reset all scores!
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shark
Other team loses 10 points!
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fairy
Take points!
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25
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lifesaver
Give 15 points!
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