Transcription of Chapter 4 Heat
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Chapter 4 Heat
Chapter 4 HeatHave you ever seen a hot air balloon float high above Earth ssurface? What about a hang glider or a soaring bird of preylike a hawk? Each of these objects a hot air balloon, a hangglider, and a hawk take advantage of heat to fly. In thischapter, you will learn about heat and temperature and howthey affect natural events and human What is the difference between heat and temperature?2. Why does an ice cube melt in your hand?3. Does the Sun help a hawk to fly?76 UNIT 2 ENERGY IN EARTH S SYSTEMSF igure : The thickness of a sheet of aluminum foil is about 200,000 atoms across. Important note: Atoms are too small to see with your eyes or a magnifying glass!molecule - a group of energy - energy of What Is heat ?What happens to an ice cube when you hold it in your hand? The ice melts because heat flows from your hand to the ice cube.
4.1 WHAT IS HEAT? 77 CHAPTER 4: HEAT Heat and temperature What is heat? Heat is a form of energy caused by the motion of atoms and molecules.* Heat is the sum of the kinetic energy of each atom in a sample. This means that a bucket of hot water has more heat
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