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Questions and Answers
When a substance is heated, energy is transferred from the substance.
When a substance is heated, energy is transferred from the substance.
False (B)
A higher temperature indicates that atoms/molecules move slower.
A higher temperature indicates that atoms/molecules move slower.
False (B)
Temperature is solely a measurement of the volume of a substance.
Temperature is solely a measurement of the volume of a substance.
False (B)
When a substance is cooled, the atoms/molecules move faster.
When a substance is cooled, the atoms/molecules move faster.
During cooling, the volume of the substance decreases due to stronger and more frequent collisions of atoms/molecules.
During cooling, the volume of the substance decreases due to stronger and more frequent collisions of atoms/molecules.
Expansion and shrinking of atoms/molecules occur when a substance is heated or cooled.
Expansion and shrinking of atoms/molecules occur when a substance is heated or cooled.
When a substance is cooled, the atoms/molecules get closer together and the volume of the substance decreases.
When a substance is cooled, the atoms/molecules get closer together and the volume of the substance decreases.
A higher temperature indicates that atoms/molecules move faster.
A higher temperature indicates that atoms/molecules move faster.
The atoms/molecules themselves physically expand when a substance is heated.
The atoms/molecules themselves physically expand when a substance is heated.
Cooling a substance results in weaker and less frequent collisions between atoms/molecules.
Cooling a substance results in weaker and less frequent collisions between atoms/molecules.
The volume of a substance increases when it is warmed due to stronger and more frequent collisions of atoms/molecules.
The volume of a substance increases when it is warmed due to stronger and more frequent collisions of atoms/molecules.
Particles moving slower indicate a higher temperature.
Particles moving slower indicate a higher temperature.
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Study Notes
Heating and Cooling
- Heating a substance means energy is transferred to the substance, resulting in a gain of energy.
- Cooling a substance means energy is transferred from the substance, resulting in a loss of energy.
Temperature and Particle Movement
- Temperature is a measurement of the average speed of atoms/molecules.
- Faster-moving particles result in a higher temperature.
- Slower-moving particles result in a lower temperature.
Effects of Heating
- When a substance is warmed, atoms/molecules gain energy and move faster.
- This results in:
- Stronger and more frequent collisions
- Atoms/molecules spreading further apart (expansion)
- An increase in the volume of the substance
Effects of Cooling
- When a substance is cooled, atoms/molecules lose energy and move slower.
- This results in:
- Weaker and less frequent collisions
- Atoms/molecules getting closer together (compression)
- A decrease in the volume of the substance
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