McKnight PMA 3 Review

Which diagram below shows a complete electrical circuit?

• A

• B

• C

• D

Annabelle and José are building a complete circuit for their science inquiry in class. They want the lightbulb to turn on and off so they install a switch. The light switch can be used to open and close their circuit.

Given the information above, which statement below must be true about using a switch in a circuit?

• A. The switch must use a conductor such as rubber to open the circuit and light the bulb.

• B. The switch must use an insulator such as rubber to close the circuit and light the bulb.

• C. The switch must use an insulator such as copper to open the circuit and light the bulb.

• D. The switch must use a conductor such as copper to close the circuit and light the bulb.

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?

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

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

• C. Katie sits at the top of the slide to before she will take her turn to go down the slide.

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

Tim puts thermometers in four identical boxes. He covers each box with a top made of a different kind of material.

Tim leaves the boxes outside on a hot sunny day. After 2 hours, which thermometer should show the highest temperature?

• A. cork

• B. wood

• C. rubber

• D. aluminum

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

• A. He holds the basketball in his hands.

• B. He balances the basketball on his head.

• C. He sits on the basketball on the ground.

• D. He spins the basketball on his index finger.

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?

• A. They repel one another.

• B. They attract one another.

• C. They neither attract nor repel one another.

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

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

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

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

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

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

Rahim is watching his favorite football team on television. In order to work, the television must be plugged into an electrical outlet. When the television gets turned on, what is the main energy transformation demonstrated by the television?

• A. heat energy into electrical energy

• B. electrical energy into heat energy

• C. electrical energy into light energy

• D. light energy into electrical energy

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

• A. to produce electricity

• B. to insulate the electrician

• C. to keep the electrician dry

• D. to create an electrical circuit

Rosie had a picnic. She placed one bag of ice on a table in the shade and another bag in the Sun. Both bags were the same size and shape. The ice placed in the Sun melted more quickly. Why?

• A. The bags of ice were different types.

• B. A summer day is usually warmer than a winter day.

• C. Things heat up more slowly in the Sun than in the shade.

• D. Things heat up more quickly in the Sun than in the shade.