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Energy can be obtained (taken) from ________ or ___________sources.
renewable, non-renewable
fast, slow
hot, cold
man-made, natural
Most of our electricity comes from _______________
energy stations
playstations
power stations
train stations
Coal, oil and gas are
non-renewable sources
renewable sources
Coal, oil and gas are called....
fossil fuels
rocks
solids
renewable sources
How long does it take for coal, oil and gas to form (to be made)?
millions of years
hundreds of years
billions of years
thousands of years
What does 'run-out' mean?
to use all of something and have nothing left.
to build something outside
to use something while running outside.
to run
The Sun, wind and water are all __________ energy sources.
renewable
non-renewable
Using non-renewable energy sources causes ________-and can harm the environment.
natural disasters
pollution
wind
photosynthesis
Most mirrors are made of a sheet of ____________ with a thin coat of _____ on the back
a rough surface, sand paper
polished glass, silver paint
polished plastic, gold paint
unpolished glass, silver paint
Which animal uses echoes to find its way in the dark?
An owl
A cat
A rabbit
A bat
Sound can't travel through water.
False
True
Sound can travel through solid objects.
True
False
Sound doesn't travel all directions.
False
True
Sound can travel when there's no air.
False
True
Sound is produced when objects ....
travel
move
vibrate
fly
When light hits an opaque object a _________ forms on the opposite side of the object.
reflection
light
shadow
