经典科普资源 · 这就是物理

5 Physical Science Heat

BUILDING BLOCKS OF SCIENCE HEAT

WHAT IS HEAT? Hello there! I'm Heat! I'm a form of energy that you experience every day! Have you ever felt the warmth of the sun on your skin?

That sensation you feel... That's me! Have you ever sat around a fire? Nice and toasty, right? If you get too close, you might get burned. But there's a lot more to me than that!

HOW DO WE USE HEAT? I'm an important part of your life. In fact, I'm inside your body right now. Your body creates heat when it uses food. That's how you maintain a steady temperature.

People use heat to cook food and warm their homes. In factories, heat is used to bend and shape metals! Iron melts at about 3000 degrees Fahrenheit (1535 degrees Celsius)!

Heat can also be used to power machinery, like this car engine. Did you know that the heat from burning fuels provides the power to move nearly all automobiles and airplanes?

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