Exploring Physical Properties of Matter

Which of the following is NOT one of the five states of matter?

• Crystal

• Gas

• Liquid

• Solid

Which state of matter has the highest entropy?

• Solid

• Gas

• Plasma

• Liquid

Why are phase changes considered physical changes?

• They result in a new substance.

• They involve a change in chemical composition.

• They maintain the same substance.

• They involve a change in mass.

What happens to entropy and enthalpy when a substance changes from solid to gas?

• Both entropy and enthalpy increase.

• Both entropy and enthalpy decrease.

• Entropy increases and enthalpy decreases.

• Entropy decreases and enthalpy increases.

What is the phase change term for gas to solid?

• Fusion

• Deposition

• Condensation

• Sublimation

Why does ice float on water?

• Ice is denser than water.

• Ice is less dense than water.

• Ice has a higher temperature than water.

• Ice has a lower temperature than water.

What is a plasma phase?

• A liquid that has lost electrons.

• A solid that has gained electrons.

• An ionized gas.

• A gas that has gained protons.

Why is plasma not commonly found on Earth?

• It needs continuous high energy.

• It requires low energy.

• It is a liquid state.

• It is a solid state.

What happens to temperature during the melting process?

• It fluctuates.

• It decreases.

• It stays the same.

• It increases.

What is the definition of temperature?

• Potential energy.

• Average kinetic energy.

• Total kinetic energy.

• Thermal energy.