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How

Travels

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Unit F,Ch.12, Lesson4(How heat travels)

• How do things get warmer?• Rub your hands together

quickly………...what happens?

• Your hands warm up.• Why?• The energy from your moving

hands change to heat.

• Is a form of energy that makes matter warmer.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

• heat

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Unit F,Ch.12, Lesson4(How heat travels)

• Sources of heat: The Sun is Earth’s main source

of heat.

Fire and light bulbs also produce heat.

The coils inside an oven or toaster produce heat, too.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

• Heat can move in different ways:

• It can move through: Solids Liquids Gases Space, this help us because

space lies between Earth and the Sun.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

A thermometer measures temperature.

Is a measure of how warm or cold something is.The unit of temperature is called degree.The symbol of degree is tiny raised circle (⁰)

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

temperature

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Unit F,Ch.12, Lesson4(How heat travels)

How does the soup in the pot get warmer?

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

Some materials need more energy to cause the same change in their temperature. At the beach, you find sand and water both under the same heat source ( the Sun).

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

the sand gets very hot, but the water stays much cooler.??The water needs more energy to cause the same change in temperature.

Why would you like to swim on a hot day?

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

How does heat change Matter?You can’t see heat or hold it in your hands, but you can see how heat changes the matter.The sun heat the road day after day, this made the road expand (get bigger) Why??o The matters are made of

particles.o Adding heat, makes the

particles move faster and move farther apart

o This make the matter expand.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

when matter loses heat (cools):o The particles slow downo They move closer togethero The matter contract or gets

smaller.Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

* How the thermometer work to tell the temperature ?• A thermometer is a glass tube

filled with a liquid( mercury).• The liquid expands or contracts

to show different temperatures.• When thermometer is in a

warm place, the liquid expands and rises

• When air around thermometer loses heat, the liquid contracts or falls.

• The level tells you the temperature.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

Heat always flows from warmer objects to cooler ones. heat flows from a warmer table to a cold ice pop, the table loses heat and the ice pop gains heat, until they are the same temperature.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

How can you control the flow of heat?Why our cooking pots are made of metals such as iron or aluminum?

Heat moves quickly through metals.

The heat moves from the stove to the metal pot.

The pot gets warm.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

Materials such as metals are good conductors.

Is a material that heat moves through easily.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

conductor

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Unit F,Ch.12, Lesson4(How heat travels)

heat doesn’t move quickly through some other materials, such as wool, fur, cotton and wood.These materials are called insulators

is a material that heat doesn’t move through easily.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

insulator

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Unit F,Ch.12, Lesson4(How heat travels)

In the cold weather people need to stay warm, they wear clothing that traps heat.

Insulation keeps heat inside the house.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

Winters in the north get very cold.

How animals live and stay warm?

Good insulators cover their bodies.

Animals such as Walrus have layers of fat under their skin.

Fat is an excellent insulator.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels) Bears have very thick hair

that helps trap heat inside the animal’s body.

The red-eyed tree frog can live only in warm places, such as rain forest.

In the cold places its thin skin would lose heat and die.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

How can energy change?Heat is a form of energy.Energy can change from

one form to another.Many forms of energy can

change into heat.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

Examples:1-Rub your hands together.Energy of moving changes into heat.The same reason, bending a wire or sawing wood produce heat.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.

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Unit F,Ch.12, Lesson4(How heat travels)

Examples:2-Fuel, such as wood or gasoline.They have energy locked in them, when fuel is burned, heat is given off.

Food is fuel for your body.As your body uses food, heat is produced….that’s why your body has certain temperature.

Vocabulary:HeatTemperatureDegreeConductorInsulatorObjectives:I will be able to know:1-heat is a kind of energy that makes things warmer.2-how heat changes matter.3-how can we control heat flow.4-how can energy change.