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Energy Gets Things Going
What do a banana, a bus, and your body have in common? They're all full of energy! Energy is what gets things going.
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Types of Energy
You twirl. You tumble.
Motion is a form of energy.
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Keep on exercising and you'll get hot. Heat is energy, too.
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Vroom! As a bus zips down the street,
it rumbles. Sound is another
kind of energy. The bus turns
on its headlights. That's right!
Light is energy, too.
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But what about that banana?
It doesn't move.
It's not hot, loud, or bright.
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That banana has potential energy stored
inside it. When you eat the banana,
its energy goes into your body.
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Changing Energy
Energy can move from one thing to another. As it does, it often changes form.
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The banana's energy lets you tap and twirl. Potential energy in the banana changes to motion in your body.
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Energy High and Low
Another kind of potential energy can come just from putting something up high.
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Climb up a diving board. Up there, your body has a lot of potential energy. It just takes a nudge for you to fall and make a huge splash.
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Now you're standing in the shallow end of the pool.
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Your body doesn't have potential
energy anymore. You'd have to work
really hard to make a splash that big!
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The Sun
You get energy from bananas and other food. But where does food's energy come from?
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It comes from the sun.
The sun is the source of
almost all energy on Earth.
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The sun gives off heat. Plants use the sun's energy to grow. They store the energy in their leaves and fruit.
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When animals eat plants, the energy transfers
to the animals' bodies. When you eat plants
and animals, the energy goes into your body.
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Kinds of Fuel
Chop up wood and make a campfire.
Plants can be used as fuel.
Burning fuel provides us
with energy.
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Millions of years ago, giant plants soaked up the sun's energy. The plants fed ancient sea creatures.
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Little by little, those plants turned into coal.
The sea creatures turned into oil and natural gas.
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Coal, oil, and natural gas are fossil fuels. Fossil fuels heat our homes. They power our cars and give us electricity.
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But Earth's fossil fuels are running out!
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Scientists are looking for new ways to run cars and heat homes. Sunlight, wind, and even ocean waves are energy sources that will never run out.
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Energy makes our world shine, move, and grow.
Are you excited about energy?
