Toggle Navigation
Games
Blog
Class PIN
Join for Free
Sign in
Toggle Navigation
Games
PIN
Join for Free
Blog
Pricing
Contact us
Help center
Sign in
Study
Unit 4-5-6 Science 4
0
%
0
0
0
Back
Restart
True or False: Sound CANNOT travel through water.
False
Oops!
Okay!
Give unpleasant sound.
Alarm / Bell / Horn
Oops!
Okay!
Sound can travel through.............
Liquid
Oops!
Okay!
We can see an object because light from a light _____ reflects off the object and enters our eyes.
source
Oops!
Okay!
True or False: Living organisms need oxygen for respiration.
True
Oops!
Okay!
True or False: Wind turbines produce energy from wind to use for sailboats.
False
Oops!
Okay!
Temperature of boiling water.
100 °C
Oops!
Okay!
What percentage of Oxygen in the air?
21%
Oops!
Okay!
True or False: Living organisms all need air for respiration.
True
Oops!
Okay!
What percentage of Other Gases in the air?
1%
Oops!
Okay!
True or False: Humans and animals breathe in nitrogen and breathe out carbon dioxide.
False
Oops!
Okay!
True or False: Fire needs air to burn.
True
Oops!
Okay!
When you are healthy, your body temperature is _______.
37 °C
Oops!
Okay!
What percentage is Nitrogen in the air??
78%
Oops!
Okay!
Name 3 light sources.
lamp / Sun / torch
Oops!
Okay!
True or False: Carbon dioxide makes up most of the air.
False
Oops!
Okay!
Sound travels as v_ br _ ti _ ns .
vibrations
Oops!
Okay!
True or False: Wind supports sailboats to move.
True
Oops!
Okay!
Light travels in .................... lines.
straight
Oops!
Okay!
True or False: The moving air from a hotter place to a cooler place is wind.
True
Oops!
Okay!
Name 2 opaque objects.
table / chair / book...........
Oops!
Okay!
Your experience on this site will be improved by allowing cookies.
Allow cookies