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Unit 4-5-6 Science 4

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    Read and Answer the carefully
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  • What percentage is Nitrogen in the air??
    78%
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  • What percentage of Oxygen in the air?
    21%
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  • What percentage of Other Gases in the air?
    1%
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  • True or False: Humans and animals breathe in nitrogen and breathe out carbon dioxide.
    False
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  • True or False: Living organisms need oxygen for respiration.
    True
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  • True or False: Fire needs air to burn.
    True
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  • True or False: Wind turbines produce energy from wind to use for sailboats.
    False
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  • True or False: The moving air from a hotter place to a cooler place is wind.
    True
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  • True or False: Living organisms all need air for respiration.
    True
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  • True or False: Carbon dioxide makes up most of the air.
    False
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  • True or False: Wind supports sailboats to move.
    True
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  • Name 2 opaque objects.
    table / chair / book...........
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  • Light travels in .................... lines.
    straight
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  • Name 3 light sources.
    lamp / Sun / torch
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  • Temperature of boiling water.
    100 °C
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  • When you are healthy, your body temperature is _______.
    37 °C
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