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