the heat is on!!!!!!!!!!. what is heat? heat is the flow of energy from one place to another. heat...
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THE HEAT IS ON!!!!!!!!!!
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What is Heat?
• Heat is the flow of energy from one place to another.
• Heat always flows from warmer objects to cooler objects.
Sun Land
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The Sun: Our Main Source of Heat
• The sun is our main source of heat here on Earth.•Heat from the sun travels
through the air until it reaches our skin. This warms us up!!!
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A Little Fuel on the Fire
• A fuel is anything that can be burned to produce heat like wood, oil, coal, or gas.
• Some fuels are fossil fuels.• Fossil Fuels- formed millions of years ago
from the remains of ancient plants and animals– coal, natural gas, and oil
• Fossil fuels are nonrenewable resources from the Earth. When they’re gone, they’re gone.
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More Sources of Heat
• Electricity produces heat. It also powers machines that produce heat.
• Friction- two materials rubbing together (like your hands on a cold day!!!!)
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What Materials Transfer Heat?
• Materials that transfer heat well are called conductors.
• Metals like copper, iron, silver, and aluminum are examples of conductors.
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What Materials Do Not Transfer Heat Well?
• Materials that do not transfer heat well are called insulators.
• Examples: wood, plastic, cloth, rubber
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Heat in the Kitchen
Where is the conductor and insulator located on this frying pan?
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Three Ways Heat is Transferred
• Conduction—the transfer of heat energy between two objects that are touching.
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Three Ways Heat is Transferred
• Convection—the transfer of heat energy through a fluid like a liquid or gas.
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Three Ways Heat is Transferred
• Radiation—the transfer of heat energy through space or air.
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How Does Heat Affect Size?
• Most matter expands, or gets larger when heated.
• When matter cools, it contracts, or shrinks.
* Remember what the physicist showed you on Career Day with the brass ball and brass ring?
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People Keep Warm By…• Wearing layers of clothing to form insulation
• Rubbing hands together
• Building a fire
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People Keep Warm By…
• Turning on a heater
• Sitting near the sunlight
• Using an electric blanket