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20
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What is a renewable energy source? Give 2 examples.
It's a source of energy that never runs out. Eg. wind and solar energy...
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10
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True or false, using wind as a source of energy is a new idea?
False, people have been doing this for thousands of years
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5
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What is the main driver of wind?
The sun's warmth
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10
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Which set of people used to use wind to power their sailboats along the river Nile?
Ancient Egyptians
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20
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What is torque?
The rotational energy that is converted by the rotor blades of the windmill from the wind's energy.
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15
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What is wind?
The movement of air
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15
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Why is a windmill called by that name?
It uses the power of wind when milling grains.
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baam
Lose 20 points!
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gift
Win 10 points!
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fairy
Take points!
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25
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lifesaver
Give 20 points!
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15
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How much torque is produced depends on 3 things, what are they?
Air density, wind speed and the length of the rotor blades
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25
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How does the sun help to create wind?
As sunlight hits the Earth, it warms the air. The warm air is lighter so it rises while the cool air sinks. This movement creates wind.
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15
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Give 3 ways in which we can use wind.
To sail ships, pump water, make electricity, mill grain...
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15
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What is a wind turbine used for?
A wind turbine turns wind energy into electricity.
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baam
Lose 15 points!
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fairy
Take points!
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25
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fairy
Take points!
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thief
Give points!
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monster
Reset all scores!
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shark
Other team loses 20 points!
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rocket
Go to first place!
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banana
Go to last place!
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10
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What were the 2 main uses of windmills in the middle east regions 1500 years ago?
To grind grain and draw water
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10
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What two things cause air to move?
The sun and Earth's rotation
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