We all know the sun is important. It provides life for plants, animals, and people here on Earth. But how does the sun do that? It's the sun's energy that makes life on our earth possible.
What is solar energy?
Energy from the sun is called solar energy. It comes in the form of light or heat (热量). Solar energy is what makes you feel hot when you sit in the sunlight. People have used solar energy for thousands of years. Houses are built with windows, so sunlight can get inside and it can also provide heat. The sun's energy can also be used to heat water and even food. If you have a magnifying glass(放大镜), your parents have probably warned you not to leave it in the sun. Solar energy can make the magnifying glass burn things under it.
How can electricity be produced by the sun's light?
We can also turn the sun's light into electricity(电能). This is done with solar boards. Using this technology, we can run a calculator(计算器) and even power cars. But what happens when clouds stop the solar boards from working? Does this mean that solar energy can only be used on bright sunny days? Solar boards can store(储存) electricity when the sun is shining. This stored electricity can be used at night or on cloudy days.
Is solar energy expensive?
Solar energy is not as expensive as it used to be. Since the sun gives off (散发) more energy than people have used, imagine what we could do if we use the sun's energy to power our earth.
| It's for life on our earth to live without the sun's energy. | |
| is solar energy? | People could solar energy thousands of years ago. Sunlight can go windows to provide heat inside. Water and food can be heated by the sun's . You may be not to make things burn in the sun with a magnifying glass. |
| How to electricity | The sun's light can also be into electricity. We store electricity on days and use it at night or on cloudy days. |
| Is solar energy expensive? | Solar energy is than it used to be. |
