States of Matter and Energy

What are the two main aspects that differentiate solids, liquids, and gases?

• Intermolecular spacing and molecular speeds

• Temperature and pressure

• Volume and mass

• Color and shape

In a gas, how are the molecules typically spaced?

• Very close together

• Moderately spaced

• Far apart

• Touching each other

How do the molecular speeds in liquids compare to those in gases?

• Faster in liquids

• Slower in liquids

• The same in both

• Liquids have no molecular speed

What happens to potential energy as molecules move farther apart?

• It becomes zero

• It increases

• It remains the same

• It decreases

What does internal energy consist of?

• Total potential and kinetic energy of molecules

• Only kinetic energy

• Energy from external sources

• Only potential energy