OSE Unit 1 Thermal Energy

What role does a lid play in maintaining the temperature of a liquid inside a cup?

• It speeds up matter loss

• It changes the color of the liquid

• It slows down matter loss

• It increases the temperature

What is the smallest particle of water?

• Atom

• Molecule

• Cell

• Electron

What happens to water molecules in liquid when they gain a lot of energy?

• They freeze

• They become solid

• They evaporate into gas

• They become colder

What is true about a closed system?

• Matter can enter and leave freely

• The mass of a closed system changes

• Matter does not enter or leave

• It is always open

What is the effect of adding more particles to a sample of matter on temperature?

• Temperature decreases.

• Temperature increases.

• Temperature stays the same.

• Temperature fluctuates randomly.

What happens to the temperature of matter in a neighboring system when the temperature of a sample decreases?

• It decreases.

• It increases.

• It stays the same.

• It fluctuates.

What is the relationship between particle speed and kinetic energy?

• Speed is unrelated to kinetic energy.

• Higher speed means less kinetic energy.

• Higher speed means more kinetic energy.

• Speed and kinetic energy are the same.

What happens to particle kinetic energy when particles in a sample of matter are in contact with another sample?

• It decreases.

• It stays the same.

• It is transferred from warmer to cooler pieces.

• It is transferred from cooler to warmer pieces.

What is evaporation?

• Change from gas to liquid

• Change from liquid to gas

• Light passing through an object

• Heat transfer from cold to hot

What is the definition of translucent?

• Light cannot pass through

• Some light can pass through

• Light can pass through

• Light is absorbed