Exploring Materials and Changes - Earth's Systems

What is the state of matter that takes the shape of its container but has a definite volume?

• Solid

• Liquid

• Gas

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Which of these materials is best used as an insulator?

• Metal

• Plastic foam

• Glass

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What happens to water when it is placed in a freezer?

• It melts

• It evaporates

• It freezes

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Which of the following objects can be disassembled and reassembled into a new object?

• A wooden block

• A set of LEGO bricks

• A glass bottle

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Which material is transparent?

• Wood

• Glass

• Metal

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What is the process called when a liquid turns into a gas?

• Freezing

• Boiling

• Melting

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Which of these changes can be reversed by cooling?

• Melting chocolate

• Burning wood

• Baking a cake

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How can you classify materials based on their properties?

• By their color only

• By their observable properties like texture, hardness, and flexibility

• By their size only

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Which material would be best suited for making a raincoat?

• Cotton

• Wool

• Plastic

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What evidence would you use to argue that ice melting is a reversible change?

• Ice turns into water and cannot be changed back

• Ice turns into water and can be refrozen into ice

• Ice disappears completely when it melts

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