Page 42 - 新思维科学学生用书6 样章
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1 State whether each of the following statements is true or false.
Correct the false statements.
a The heart pumps air around the body.
b Your heat beats faster when you exercise.
c Your pulse rate tells you how fast you are exercising.
d Blood moves around the body in special tubes called blood vessels.
e The veins carry blood to all parts of the body.
2 Marcus and Arun measured the pulse rates of some of their friends
before and after exercising for three minutes. These are their results.
Name Pulse rate before exercise Pulse rate directly after exercise
Marcus 91 120
Arun 88 122
Jamal 90 128
Kai 89 125
a What equipment did they need to measure the pulse rates?
b Draw and label a bar graph of the pulse rates measured before
and after exercise.
c Use the results to make a conclusion.
d Predict what would happen to the pulse rates if they were measured
10 minutes after exercise. Give reason for your prediction.
3 Name each of the following:
a the body organs used for breathing
b the gas we need to breathe in
c the gas our bodies must get rid of
d the substance that carries the gases around the body
e the muscle that helps us breathe
f the part of the skeleton that protects the breathing organs
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