Big Idea 10 and 11

While playing at the park, Katie and her sister take turns going down the slide and playing on the swings.

Which of the following is an example of change that is caused by applying energy?

• Katie continues to swing back and forth without doing anything.

• When Katie pushes her sister on the swings, the swing moves faster.

• Katie sits at the top of the slide and waits for her sister to finish her turn.

• When Katie stops pushing her sister on the swings, the swing eventually comes to a stop.

Todd can throw a baseball from the outfield all the way back to home plate.

Why does he have to move his arm in order to make the ball fly all that way?

• He has to get the ball high enough in the air so the air can support it.

• The ball's energy can only be released if he lets it go above the ground.

• Moving his arm makes the ball's own energy take it in the right direction.

• He has to transfer some of his muscle's energy to the ball to make it move.

You rub two balloons on your hair on a dry day. Your hair is attracted to both balloons. Then, you bring the balloons near one another.

How would you describe what happens to the balloons?

• They repel one another.

• They attract one another.

• They neither attract nor repel one another.

• Opposite charges make one balloon become larger and one become smaller.

An electrician wears rubber gloves for protection when working on the wiring in a house. What is the purpose of the rubber gloves?

• to produce electricity

• to insulate the electrician

• to keep the electrician dry

• to create an electrical circuit

Russell is on a camping trip with his family. To warm their food, they put it in a bowl and place the bowl on a rack over the fire.

Which material should the bowl be made from to conduct the heat from the fire most effectively to warm the food?

• wood

• plastic

• rubber

• aluminum

Celine has read that light can be reflected and absorbed. She holds a mirror to the light. She sees a spot of light on the ground near her.

What conclusion can she draw?

• The mirror is absorbing all of the light.

• The mirror is not reflecting or absorbing light.

• The mirror is bending the light onto the ground.

• The mirror is reflecting the light onto the ground.

John is practicing his basketball skills. Which of his actions would demonstrate a change caused by applying energy to the basketball?

• He holds the basketball in his hands.

• He balances the basketball on his head.

• He sits on the basketball on the ground.

• He spins the basketball on his index finger.

Ryder writes a summary of a lesson about heat energy. Which statement should Ryder include in his summary?

A.

B.

C. D.

• Objects that give off heat always give off light energy.

• An object’s temperature is not affected by heat transfer.

• Heat always moves from where it is cooler to where it is warmer.

• Heat always moves from where it is warmer to where it is cooler.

During a storm, the power goes out at Brandon's house. His mother strikes a match to light a candle. As the match burns, it gives off light energy.

What other form of energy does the burning match produce?

• thermal

• electrical

• mechanical

• gravitational

The chart shows the results of an investigation.

What can you conclude from the information in the chart?

• Sand and marbles are conductors

• Tap water, saltwater, and aluminum foil are conductors.

• The lightbulb did light when an insulator was placed in the electrical circuit.

• The lightbulb did not light when a conductor was placed in the electrical circuit.