Energy and Matter

What is the definition of energy?

• the ability to see in the dark

• the force that attracts objects to the ground

• capacity of a physical system to do work or produce heat

• the process of converting matter into energy

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Name three forms of energy.

• mechanical energy

• electrical energy

• kinetic energy, potential energy, thermal energy

• nuclear energy

Explain the law of conservation of energy.

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What is potential energy?

• The energy possessed by an object due to its position or condition.

• The energy possessed by an object due to its temperature.

• The energy possessed by an object due to its color.

• The energy possessed by an object due to its motion.

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Give an example of kinetic energy.

• running water

• blowing wind

• burning candle

• moving car

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What are the three states of matter?

• solid, liquid, gas

• plasma, liquid, gas

• solid, plasma, gas

• solid, liquid, plasma

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Define solid state of matter.

• Particles loosely packed together with a fixed shape and volume.

• Particles closely packed together with a variable shape and volume.

• Particles closely packed together with a fixed shape and volume.

• Particles closely packed together with a fixed volume but variable shape.

What happens to matter when it changes from a liquid to a gas?

• The matter condenses into a solid.

• The matter dissolves into a liquid.

• The matter undergoes sublimation.

• The matter undergoes vaporization or evaporation.

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What is the process called when a gas changes directly into a solid?

• deposition

• evaporation

• condensation

• sublimation

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Explain the concept of thermal energy.

• Thermal energy is the energy that is transferred between objects due to a temperature difference.

• Thermal energy is the total kinetic energy of the particles in an object or system.

• Thermal energy is the energy that is released or absorbed during a chemical reaction.

• Thermal energy is the energy stored in the form of heat.

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