The sun provides sunshine for plants, animals, and people here on Earth. Energy from the sun is called solar energy. It comes in the form of light or heat. Solar energy makes you feel hot. People have used solar energy for thousands of years. Houses were built with windows so that sunlight can get inside and provide heat. The sun’s energy can also be used to heat water and even food.
We can also turn the sun’s light into electricity. This is done with solar panels(太阳能电池板). Solar panels are made up of silicon(硅). When the sunlight reaches the solar panel, the electron(电子) in the silicon, moves and flows through wires in the solar panel.
Using this technology, we can run even cars. But what happens when clouds block the solar panels? The electrons in the silicon will stop moving. But this doesn’t mean that solar energy can only be used on bright sunny days. Solar panels can have batteries to store(储存) electricity for a rainy day. When the sun is shining, the electricity flows from the solar panel into the batteries. This stored electricity can be used at night or on cloudy days.
Solar energy is not as expensive as before. The sun produces more energy in one second than people have used since the beginning of time. Just imagine what we could do if we used the sun’s energy to power our Earth.
【小题1】Which of the following is NOT true about solar energy?
| A．It comes in the form of light or heat. | B．It can make people feel cool. |
| C．It can be used to heat water and food. | D．If has been used for thousands of years. |
【小题2】What does the second paragraph mainly tell us?
| A．How electricity is used to run cars. | B．How sunlight is turned into electricity. |
| C．How electricity is stored. | D．How people can use electricity from sunlight. |
【小题3】What does the underlined word
“block” mean in Paragraph Three?
| A．Take. | B．Find. | C．Help. | D．Stop. |
【小题4】What can store electricity from sunlight?
| A．Solar panels. | B．Electrons. | C．Batteries. | D．Wires |
【小题5】What’s the best title of his passage?
| A．Solar energy: the power of the sun. | B．Solar panels. |
| C．Energy we use today. | D．Bright sunny days. |
