Chapter 3 Pretest - Heat

What direction does heat flow in?

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WHat happens if two objects that are touching have the same temperature?

• No heat transfer occurs between them.

• Heat will flow from one object to another.
• One object will become hotter than the other.
• The objects will explode due to equal temperature.

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The average kinetic energy of an object measures

• heat

• thermal energy

• temperature

• how hot or cold something is

• how fast your going

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Particles that have energy added to them generally are

• slower and have a lower temperature

• faster and have a higher temperature

• less dense

• more dense

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​ (a)   objects have particles that move more rapidly, resulting in ​higher kinetic energy and thus a ​ (b)   temperature.

• Hot
• higher
• Cold
• Lower

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What is thermal energy or heat energy?

• Thermal energy is the total kinetic energy of particles in a substance

• Thermal energy is how hot or cold an object is

• Thermal energy is the energy produced by electrical currents.
• Thermal energy is the energy stored in chemical bonds of molecules.
• Thermal energy is the average kinetic energy of particles in a substance

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What is the difference between thermal energy and temperature?

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In what situation would an object with a colder temperature have more heat energy than an object with a higher temperature?

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If you have two identical objects, one is heated up and the other is cooled, which one will have a lower density because they have a larger volume?

• The heated object will have a lower density.
• The heated object will have a higher density.
• Both objects will have the same density.
• The cooled object will have a lower density.

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Why do hot fluids tend to rise and cool, fluids tend to sink?

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