Matter & Energy Review

During soccer practice, Coach Williams rolls a ball to Carly, who kicks it hard to the other side of the field. Which best explains what happened to the ball when Carly kicked it?

• The ball recycled the energy from Carly's kick, keeping the same speed.

• Carly's kick created gravity forcing the ball in the opposite direction.

• The energy from Carly's kick changed the speed and direction of the ball.

• Carly's kick pushed air particles against the ball, changing its direction.

Within the alarm clock seen here, energy is transformed. It is time to get up! The alarm clock goes off. What are the energy transformations taking place in your alarm clock?

• electrical to magnetic to sound

• electrical to mechanical to sound

• electrical to mechanical to light

• chemical to electrical to mechanical

When a student combed his dry hair for a long time, his hair began to stand up. Which of these has MOST LIKELY happened?

• The comb and hair have become charged with similar charges.

• The comb and hair have become charged with opposite charges.

• The comb has become charged, but the hair has remained neutral.

• The hair has become charged, but the comb has remained neutral.

What type of energy transformation is occurring in this closed series circuit?

• thermal energy into light energy

• sound energy into thermal energy

• electrical energy into light energy

• light energy into electrical energy

Adrienne noticed a puddle in her driveway after a rainstorm. The Sun then came out and it became very hot outside. Later that afternoon, she noticed the puddle was much smaller. What made the puddle become smaller?

• The rain stopped falling.

• The puddle froze into an ice cube.

• The Sun heated the water and it evaporated.

• The water disappeared.

Your class decides to build a circuit to make a light bulb shine. When you are finished, you have a setup like the picture above. Will your light bulb shine?

• No, because there is no power supply.

• No, because there is a break in the wire.

• Yes, because there is a break in the wire.

• Yes, because it is connected to a power supply.

What does this tell you about the ice cube?

• It is a gas.

• It is a solid.

• It is both a gas and a solid.

• It is both a liquid and a gas.

Which of the following statements is TRUE?

• In a radio, sound energy is transformed into electricity energy.

• In a microwave oven, electricity is transformed into chemical energy.

• In a hair dryer, electrical energy is transformed into light and heat.

• In a computer, electrical energy is transformed into sound, light, and heat.

Mrs. Hill's class is studying about different forms of matter. She has three containers sitting on the table: one rectangle-shaped, one square-shaped, and one oval-shaped. She pours the same amount of an unknown substance into the three containers. The substance sits at the bottom and spreads out to take the shape of each container. What do we know about this unknown substance?

• The substance has to be a liquid.

• A substance like this could never exist.

• The substance can be either a solid or a gas

• The substance would have to change each container's shape

If you hit a drum extremely hard, it will make a loud sound. The same drum, if you hit it softly, will make a much lower volume sound. Why does hitting the drum at different strengths produce different volumes?

• Because the vibrations are not the same strength.

• Because the vibrations are the same strength.

• Because the pitch is not the same strength.

• Because the pitch is the same strength.