Physics Heat

1. What is the scientific definition of heat?

• The sensation or feeling of warmth

• The opposite of cold

• The property of having a temperature above 30°C

• Thermal energy that is transferred from one substance to another

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2. When you cook pancakes in a hot pan, in which direction does heat move?

• There is no movement of heat

• From the pan to the pancakes

• From the pancakes to the pan

• Between the pan and the pancakes, in both directions

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3. Compared to cold substances, hot substances have:

• more thermal energy

• less thermal energy

• particles with more kinetic energy

• particles with less kinetic energy

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4. Why does your hand feel cold as an ice cube melts on it?

• Cold energy is transferred from the ice to your hand

• Thermal energy is transferred from your hand to the ice

• Thermal energy can't transfer between your hand and ice

• Thermal energy is transferred from the ice to your hand

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5. Why does water vapour, a gas, have more thermal energy than ice? Explain, using the terms: particles, kinetic energy and thermal energy.

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6. Conduction is the transfer of heat:

• from cooler objects to hotter ones

• by currents as hot substances rise and cold substances fall

• across empty space, such as from the Sun to Earth

• between substances in direct contact with one another

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7. Which of the following is the best example of conduction?

• Hot water rising above cold water

• Ironing a shirt

• An air conditioner cooling a room

• Warming your hands by a fire

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8. What type of energy is passed between particles during conduction?

• Chemical

• Speed

• Light

• Kinetic

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9. A cold metal spoon is placed in a bowl of hot soup. Which of the following statements is correct?

• Thermal energy is not transferred between the soup and the spoon

• Thermal energy is transferred from the spoon to the soup

• Thermal energy is transferred from the soup to the spoon

• The particles in the spoon are moving faster than the particles in the soup

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10. Insulators:

• do not allow heat to easily flow through them

• allow heat to easily flow through them

• are usually made of metal

• tend to feel very cold or hot when you touch them

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