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Team 2
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15
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Which variable should be kept the same (controlled) in an air pollution investigation?
Number of cars
Type of measuring tool
Distance from road
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seesaw
Swap points!
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fairy
Take points!
5
10
15
20
25
×
gift
Win 5 points!
Okay!
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thief
Give points!
5
10
15
20
25
15
×
Which place is likely to have the most air pollution?
Forest
Park
Busy road
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15
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Which of these is a source of air pollution?
Wind
Cigarette smoke
Fresh air
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15
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What happens when we breathe in?
Oxygen enters the lungs
Oxygen leaves the body
Carbon dioxide enters the lungs
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15
×
Why is breathing polluted air harmful?
It makes air heavier
It helps lungs work better
It can damage lungs
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baam
Lose 5 points!
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fairy
Take points!
5
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25
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shark
Other team loses 20 points!
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lifesaver
Give 10 points!
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15
×
Which tool can be used to observe air pollution levels?
Air quality sensor
Rain gauge
Thermometer
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15
×
Fumes from spray cans can pollute the air because they contain ____
Oxygen
Chemicals
Water droplets
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15
×
Which gas do humans need to breathe in to stay alive?
Oxygen
Nitrogen
Carbon dioxide
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15
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Why is air important to living things?
It contains gases needed for life
It is heavy
It is colourful
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lifesaver
Give 20 points!
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gift
Win 20 points!
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gift
Win 25 points!
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thief
Give points!
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15
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25
15
×
Why is nitrogen the most common gas in the air?
Plants make it
It does not react easily
It is heavy
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15
×
Which of these is a harmful air pollutant?
Oxygen
Smoke
Nitrogen
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15
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Which of these helps reduce air pollution?
More cars
Planting trees
Burning rubbish
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15
×
Cigarette smoke is harmful because it ____
Contains clean gases
Has oxygen
Contains toxic chemicals
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