2.2: Thermal Conductors and Insulators

What is conduction?

• the way that cold travels through liquid

• the way that cold travels through solid objects

• the way that heat travels through liquid

• the way that heat travels through solid objects

Answer explanation

Conduction is the process by which heat travels through solid objects. It occurs when heat energy is transferred from one particle to another within a solid, making the way that heat travels through solid objects' the correct choice.

Tags

NGSS.MS-PS3-3

Explain in your own words what a thermal conductor is.

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Why do you think pots and pans are made of metal?

Answer explanation

Pots and pans are made of metal because metal conducts heat well, allowing for even cooking. Additionally, metals are durable and can withstand high temperatures, making them ideal for cooking applications.

Tags

NGSS.MS-PS3-3

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Why do you think the handles of pots and pans are made from plastic?

Answer explanation

Handles of pots and pans are made from plastic because it is heat-resistant, lightweight, and provides a comfortable grip, reducing the risk of burns while cooking.

Tags

NGSS.MS-PS1-3

In which cup will your tea stay warm longest?

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Organize these options into the right categories.

Groups:

(a) Electrical Conductors

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(b) Electrical Insulators

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NGSS.MS-PS1-3

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Why does a metal spoon feel colder than a wooden spoon at room temperature?

• Metal is a good conductor of heat.

• Metal has a higher melting point than wood.

• Metal has a lower thermal conductivity than wood.

• Metal has a higher specific heat capacity than wood.

Tags

NGSS.MS-PS3-3

Which parts of the light bulb conduct electricity?

• metal filament

• glass bulb

• supporting wires

• wires

• base

It is possible to identify a substance from looking at its properties. The table contains some properties of five susbtances. Which TWO substances could be steel?

• A

• B

• C

• D

• E

Answer explanation

Substances A and D likely have properties consistent with steel, such as having magnetic properties and being good thermal conductors . Other options may not exhibit these characteristics, making A and D the correct choices.

It is possible to identify a substance from looking at its properties. The table contains some properties of five susbtances. ONE of the substances is water. Which substance could it be?

• A

• B

• C

• D

• E

Answer explanation

Substance E likely has properties that match those of water, such as being a liquid at room temperature, having a melting point of 0°C and a boiling point of 100°C. The other substances do not fit these criteria.