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Say 3 examples of renewable energy sources.
Solar energy, wind energy, hydroelectric energy and biomass.
Renewable or non-renewable? "They are UNLIMITED and DON'T POLLUTE (contaminate) air and water"
Renewable
Say the 3 non-renewable energy sources.
Coal, petroleum and natural gas.
Renewable or non-renewable? "They POLLUTE (contaminate) air and water"
Non-renewable
Renewable or non-renewable? "They are LIMITED and will run out in the future"
Non-renewable
In big cities, the traffic, the constructions, the people talking, etc, create ....................
Noise pollution.
Lght travels FASTER than sound. True or false?
True
Sound comes from vibrations. These vibrations produce..........that travel through ........., .......... and other materials.
Waves/ Air/ Water.
What is the name of this phenomemon?
Refraction
What is the name of this phenomemon?
Reflection
A FROSTED GLASS is an example of translucent material. True or false?
True.
Light CAN'T TRAVEL through opaque materials. True or false?
True.
We CAN'T SEE through transparent materials. True or false?
False. We CAN SEE:
Light travels VERY SLOWLY. True or flase?
False. It travels VERY FAST.
A radiador has..........energy.
Thermal
A person playing the piano produces..............energy.
Sound
The Sun produces............ and..........energy.
Light and thermal.
Digestion is a natural process that produces..............energy.
Chemical
Batteries give us............energy.
Electrical
A bird flying has...........energy.
Kinetic
We (humans) need energy to......
Run, eat, dance, write, study, do the homework...
Living and non-living things need energy. True or false?
True
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