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Unit 4-5-6 Science 4
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Sound can travel through.............
Liquid
Sound travels as v_ br _ ti _ ns .
vibrations
Give unpleasant sound.
Alarm / Bell / Horn
We can see an object because light from a light _____ reflects off the object and enters our eyes.
source
True or False: Sound CANNOT travel through water.
False
When you are healthy, your body temperature is _______.
37 °C
Temperature of boiling water.
100 °C
Name 3 light sources.
lamp / Sun / torch
Light travels in .................... lines.
straight
Name 2 opaque objects.
table / chair / book...........
True or False: Wind supports sailboats to move.
True
True or False: Carbon dioxide makes up most of the air.
False
True or False: Living organisms all need air for respiration.
True
True or False: The moving air from a hotter place to a cooler place is wind.
True
True or False: Wind turbines produce energy from wind to use for sailboats.
False
True or False: Fire needs air to burn.
True
True or False: Living organisms need oxygen for respiration.
True
True or False: Humans and animals breathe in nitrogen and breathe out carbon dioxide.
False
What percentage of Other Gases in the air?
1%
What percentage of Oxygen in the air?
21%
What percentage is Nitrogen in the air??
78%
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