Lesson 13: OpenSciEd® 6.2 Thermal Energy

What happens to the speed of particles in a liquid when the temperature drops?

• The speed of the particles decreases.

• The speed of the particles increases.

• The speed of the particles remains the same.

• The particles move in a circular motion.

What can cause changes in kinetic energy of particles in a gas?

• Collisions between particles

• Static electricity

• Gravitational force

• Magnetic fields

While using marbles as manipulatives, what do marbles represent in the particle model?

• Particles in different states of matter

• Atoms in a molecule

How would you adjust the simulation to investigate the effect of particle amount in both solids?

• Adjust the width of each solid to increase or decrease the number of particles.

• Set the temperature to -200°C and use a different setup each time.

• Change the surrounding temperature of the setup.

• Run the simulation with no solid removed and observe.

How do particle collisions explain temperature changes in the cup system?

• Faster-moving particles transfer energy to slower-moving particles, changing their speeds.

• Particles combine and increase in size.

• Particles absorb light and release heat.

• Particles lose mass during collisions.

What happens to the speed of the particles in a liquid when the temperature drops?

• The particles move more slowly.

• The particles move more quickly.

• The particles stay at the same speed.

• The particles stop moving completely.

What happens to particles in a gas after a collision?

• One particle may slow down while the other speeds up.

• They stop moving.

• They move together as a single particle.

• They lose all their kinetic energy.

In the computer simulation of particle motion, what causes a change in the speed of the particles?

• Collisions between particles

• The color of the particles

• The shape of the particles

• The type of material they are made from

What is demonstrated when rolling 2 marbles into each other along a tray?

• Particles can transfer kinetic energy during collisions.

• Particles in a gas do not change speed when colliding.

• Marbles cannot change direction after collision.

• Only liquid particles transfer kinetic energy.

What interaction did we see between the particles when we rolled marbles into each other?

• The speed of both marbles changed after the collision.

• The marbles fused together.

• The marbles bounced back unchanged.

• There was no change in speed.