Changes in Material Caused by Heating

Changes in the Properties of Materials

Open Ended

Have you ever tried to cook or make yourself food before? What is an important thing to remember while cooking or making food?

The properties of materials may change due to extreme heat or cold.

​Heating up hard or brittle materials makes them easier to manipulate (glass or metal)

​Extreme cold may also affect the properties of materials, ex: Liquid water may expand while freezing.

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​Extreme Temperature

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Multiple Choice

What is NOT an effect of extreme heat?

• candle melts

• sand clumps

• glass shatters

• water evaporates

Mixture - a combination of two or more materials.

Heterogeneous mixture - you can still identify the components.

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​Mixing with Other Materials

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Multiple Choice

Which is NOT a heterogeneous mixture?

Homogeneous mixture - you cannot see the different components anymore.

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Mixing with Other Materials

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Multiple Choice

Which one is a homogeneous mixture?

Solid mixtures can be separated manually or by sifting.

Liquids can be separated through evaporating.​

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​Separating Mixtures

Multiple Choice

Liquids can be separated from solids through evaporation. What is evaporation?

• It is when a liquid turns into gas.

• It is when a solid turns into liquid.

• It is when a solid turns into gas.

When two liquids mix, it may be hard to tell them apart. They are miscible.

Oil and water have different densities and cannot mix. They are immiscible.​

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Miscibility

Open Ended

An accident caused your uncooked rice and some sugar to get mixed. What is a tool you can use to separate them?