老师：hello boys and girls welcome to our todays class im yekunyu from Beijing with high school。 It's my great honor to get the opportunity to have a class with you together. Today we will start our learning of the viewing workshop of Unit 8 Solar Energy. I'm sure we're going to watch a short video and learn from it. But before that, I would like to share something. Like many of you, I'm an online shopper who open shop online. Recently, when I was browsing online, one product aroused my interest. Let's take a look at it. Do you know what it is? There is a blackboard with wires connected to a mobile phone and a tablet. Yes, it's actually a charger and a power bank at the same time. What makes it so special is the blackboard, which can turn the power of sunlight into electricity. So whenever it's sunny, we can use it to charge our phones. Isn't it convenient?
老师：Actually, when I went over the website, I found more products, a calculator, a street light, and a water heater. Can you find out what they have in common? Yes, all of them can use the power of sunlight. Do you have any products like this? Some of you may say yes. Well, today we'll learn more about what's behind this. Here are some questions for you to think about activating your background knowledge of the topic. No. 1, what is solar energy? No. 2, what do we use solar energy for? And No. 3, what forms of energy can solar energy change into?
老师：Some of you may find many products we mentioned actually change solar energy into other forms, right? The charger can change solar energy into electricity. The water heater can turn solar energy into heat. And the street light uses solar energy and changes it into light. Anything else? Okay. I'm sure you must have come up with your answers. Let's begin our viewing. Please watch the video and decide which of the following topics are mentioned. A, the definition of solar energy. B, some products using solar energy. See, solar energy can change into different forms.
学生：In this program, we're going to learn about solar energy. What is solar energy? Solar energy is energy that comes from the sun. The Earth's main source of energy comes from the sun. Solar energy travels millions of miles through space and strikes the earth. Silver energy is what makes you feel hot when you lie on the beach in the summer. Solar energy is what causes solar panels to turn sunlight into electricity. Solar energy is what sets a piece of paper on fire under a magnifying glass. On earth, we see solar energy as light. We feel solar energy as heat.
学生：There are many forms of energy on earth, and most of them begin as energy from the sun. The sun's energy changes when it hits the earth. For example, energy from the sun heats the Earth's air in an uneven way. This causes winds
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