THE HEAT IS ON!!!!!!!!!!.

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Presentation transcript:

THE HEAT IS ON!!!!!!!!!!

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

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!!!

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.

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!!!!)

What Materials Transfer Heat? Materials that transfer heat well are called conductors. Metals like copper, iron, silver, and aluminum are examples of conductors.

What Materials Do Not Transfer Heat Well? Materials that do not transfer heat well are called insulators. Examples: wood, plastic, cloth, rubber

Heat in the Kitchen Where is the conductor and insulator located on this frying pan?

Three Ways Heat is Transferred Conduction—the transfer of heat energy between two objects that are touching.

Three Ways Heat is Transferred Convection—the transfer of heat energy through a fluid like a liquid or gas.

Three Ways Heat is Transferred Radiation—the transfer of heat energy through space or air.

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?

People Keep Warm By… Wearing layers of clothing to form insulation Rubbing hands together Building a fire

People Keep Warm By… Turning on a heater Sitting near the sunlight Using an electric blanket