85 Heat Energy-Low

Heat Energy Written by Felicia Brown

Felicia Brown著

Introduction Have you ever stood next to a campfire? Have you ever watched soup boil? Then you have seen and felt heat energy at work! There are many kinds of energy. But you use heat energy all the time. In this book, you will learn where heat energy comes from, how it moves and much more.

你曾经站在篝火旁吗? 你看过汤烧开吗? 那么你已经看到并感受到热能在工作!能量有很多种。 但是你一直在使用热能。 在这本书中，你将了解到热能来自哪里，它如何移动和更多。

Sources of Heat Energy Rub your hands together very fast. Do they feel hot? The heat is caused by friction. Friction happens when two objects rub together. Friction is one way to make heat!

快速摩擦你的手。 他们觉得热吗?热是由摩擦引起的。 当两个物体相互摩擦时就发生摩擦。 摩擦是产生热量的一种方式!

Burning fuel is another way we get heat. Gasoline is a kind of fuel. When gasoline burns, it makes heat energy. The heat energy is used to make cars and trucks run. Electricity also makes heat energy. Toasters, irons, and hair dryers use electricity to make heat. Electric furnaces heat homes and schools.

燃烧燃料是我们获得热量的另一种方式。 汽油是一种燃料。 汽油燃烧时产生热能。 热能被用来驱动汽车和卡车。 电也产生热能。 烤面包机、熨斗和吹风机都是用电来加热的。 电炉为家庭和学校供暖。

Heat comes from nature, too. Lightning is a natural source of heat. And did you know that Earth has its own heat deep underground? It is so hot in the middle of Earth that rocks melt. Sometimes the melted rocks come close to the surface and heat water that shoots out of the ground. This shooting water is called a geyser.

热量也来自大自然。 闪电是一种天然的热源。 你知道地球的地下深处也有热量吗? 地球中心的温度太高，岩石都融化了。 有时融化的岩石靠近地表，加热从地下喷出的水。 这种喷射的水被称为间歇泉。

A lot of our energy comes from the Sun. Have you ever stepped from the shade into sunlight and felt warm? Sunlight is radiant energy. Radiant energy comes in many different forms. When sunlight hits your skin, it changes to heat. Another form of radiant energy cooks the food in your microwave.

我们的很多能量来自太阳。 你曾经从阴凉处走到阳光下感到温暖吗? 阳光是辐射能。 辐射能有许多不同的形式。 当阳光照射到你的皮肤时，它会变成热量。 另一种形式的辐射能在你的微波炉里烹饪食物。