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Solar
The sun’s energy is in many things.
We depend on solar energy
We can use solar energy.
Solar energy is renewable.
We get most of our energy from the sun. We call it solar energy. It travels from the sun to the earth in rays. Some are light rays that we can see. Some rays we can’t see, like x-rays. The sun is a giant ball of gas. It sends out huge amounts of energy every day. Most of the energy goes off into space. Only a small part reaches the earth.
We use solar energy in many ways. All day, we use sunlight to see what we’re doing and where we’re going. Sunlight turns into heat when it hits things. Without the sun, we couldn’t live on the earth – it would be too cold. We use the sun’s energy to heat water and dry clothes. Plants use the light from the sun to grow. Plants take the energy in light and store it in their roots and leaves. That energy feeds every living thing on earth. We can also burn plants to make heat.
The energy from the sun makes rain fall and wind blow. We can capture that energy with dams and windmills. Coal, oil and natural gas were made from prehistoric plants and animals. The energy in them came from the sun. We use that energy to cook our food, warm our houses, run our cars, and make electricity.
Lots of people put solar collectors on their roofs. Solar collectors capture the sunlight and turn in into heat. People heat their houses and their water using the sun’s energy. Solar cells can turn light energy into electricity. Some toys and calculators use solar cells instead of batteries. Big solar cells can make enough electricity for a house. They are expensive, but they are good for houses far away from power lines. Today, solar energy provides only a tiny bit of the electricity we use. In the future, it could be a major source of energy. Scientists are looking for new ways to capture and use solar energy.
Solar energy is free and clean. There is enough for everyone, and we will never run out of it. Solar energy is renewable. The sun will keep making energy for millions of years. Why don’t we use the sun for all our energy needs? We don’t know how to yet. The hard part is capturing the sunlight. It shines all over the earth and only a little bit reaches any one place. On a cloudy day, most of the light never reaches the ground at all.
This cell phone can be recharged by solar energy.
<---- Solar energy generator
ANDY, ANNA, JACOB
