Particles in Motion: Energy and Matter

What does kinetic energy measure?

• A. The speed of particles

• B. The concentration of particles

• C. The volume of a substance

• D. The amount of matter

What is random motion?

• A. Movement in one direction

• B. Movement at the same speed

• C. Movement in all directions and at different speeds

• D. Movement only in a straight line

How is temperature measured in the Celsius scale?

• A. Boiling point at 100°

• B. Freezing point at 32°

• C. Boiling point at 212°

• D. Freezing point at 0°

What is thermal expansion?

• A. Increase in temperature

• B. Decrease in volume

• C. Increase in volume due to particle motion

• D. Contraction of particles

What is a particle?

• A. A type of gas

• B. A small unit of matter

• C. A liquid substance

• D. A form of kinetic energy

How does diffusion occur?

• A. Particles move towards higher concentration areas.

• B. Particles move towards lower concentration areas.

• C. Particles remain stationary.

• D. Particles move in a circular motion.

How do particles in a solid move?

• A. They flow past each other.

• B. They move in straight lines.

• C. They vibrate back and forth in place.

• D. They have high kinetic energy.

How do gas particles behave compared to liquid particles?

• A. Gas particles move at low speeds.

• B. Gas particles have low kinetic energy.

• C. Gas particles move in straight lines until they collide.

• D. Gas particles vibrate in place.