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15
×
The heart works like a ___ to move blood around your body.
vessels
variable
pump
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×
boom
Lose 50 points!
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×
gift
Win 25 points!
Okay!
×
gift
Win 25 points!
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×
lifesaver
Give 25 points!
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15
×
the variable that is kept the same throughout the investigation.
control variable
independent variable
dependent variable
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15
×
the variable that is being investigated.
control variable
independent variable
dependent variable
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Check
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15
×
special tubes that carry blood around your body.
independent variable
blood vessels
dependent variable
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Check
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Check
15
×
the variable that is changed during the investigation.
dependent variable
independent variable
control variable
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Check
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Check
×
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