P&C Changes, Electricity, & Magnetism

Multiple Choice

Which of the following is NOT an example of a physical change?

• crumpling paper

• sharpening a pencil

• clothes shrinking

• sour milk

Multiple Choice

A student mixed two substances in a test tube, he

noticed that the test tube became warm. He also

noticed an odor coming from the test tube. Based

on Jose's observations, what was

most likely occurring inside the test tube?

• A. The substances were melting.

• B. The substances were evaporating.

• C. The substances were undergoing a chemical

  reaction.

• D. The substances were undergoing an

  endothermic reaction.

Multiple Choice

Which of the following models a physical

change?

• A. An apple ripens and turns red.

• B. A nail rusts and becomes reddish brown.

• C. A hamburger is cooked and turns brown.

• D. A red apple is cut in half.

Multiple Choice

A chemical reaction is occurring for certain when

a

• A. solid dissolves.

• B. new substance is formed.

• C. steamlike substance is created.

• D. mixture is made.

Multiple Choice

After Billy injured his ankle from falling off his

bicycle, his mother placed an ice pack on his

ankle. Pete noticed that the ice in the ice pack

began to melt after about 30 minutes. What was

demonstrated by the melting ice pack?

• A. a chemical change

• B. a physical change

• C. a substance being destroyed

• D. a change in the identity of a substance

Multiple Choice

A container has a mixture of salt and sand in it.

How will adding water to the container help to

separate the salt and sand?

• A. Salt will not dissolve in water, and sand will.

• B. Salt will sink, and sand will float to the top.

• C. Salt will dissolve in water, and sand will not.

• D. Salt will float to the top, and sand will sink.

Multiple Choice

What will happen if water heats on a stove long

enough?

• A. The water will evaporate.

• B. The water will melt.

• C. The mass of the water will increase.

• D. The volume of the water will increase.

Multiple Choice

Which of the following is an example of a physical

change?

• A. leaves burning

• B. plant decaying

• C. ice melting

• D. nail rusting

Multiple Choice

What happens to water after it is heated

for 10 minutes?

• A. It started to freeze, and the liquid in the pot

  started to turn into a gas.

• B. It started to freeze, and the liquid in the pot

  started to turn into a solid.

• C. It started to boil, and the liquid in the pot started

  to evaporate into a gas.

• D. It started to boil, and the liquid in the pot started

  to condense into a solid.

Multiple Choice

Which process is NOT the result of a chemical

change during a reaction?

• A. digesting food

• B. burning wood

• C. rusting metal

• D. folding paper

Multiple Choice

Reggie the robot has a brown, flaky substance after being left outside in the rain. What has the rain most likely done to the robot?

• A. It caused a chemical reaction that combined the

  atoms in his metal body, causing it to melt.

• B. It caused a chemical reaction that heated up the

  atoms in his metal body, causing it to burn.

• C. It caused a chemical reaction that rearranged

  the atoms in his metal body, causing it to rust.

• D. It caused a chemical reaction that broke apart

  the atoms in his metal body, causing it to decay.

Multiple Choice

A beaker contains a mixture of water, sugar, and sand, which has settled in a glass beaker after it was stirred for a few minutes.How could the water be separated from the

mixture so the beaker only has sugar and sand

left?

• A. filter the mixture, causing the sugar and sand to

  get caught but not the water

• B. stir the mixture, causing the water to move

  above the sugar and sand

• C. freeze the mixture, causing the water to be

  destroyed

• D. heat the mixture, causing the water to evaporate

Multiple Choice

When liquids X and Y react, a solid, Z, is formed.

Combining liquids X and Y causes a

• A. physical change.

• B. chemical change.

• C. change in phase.

• D. change in mass.

Multiple Choice

Bob finds a box of plastic bottle caps and

pennies in her drawer. What is the best way for

her to separate them without touching the

objects?

• A. place the objects in a bowl of water

• B. pour the objects through a strainer

• C. put the box of objects in the oven

• D. run a magnet through the mixture

Multiple Choice

True or False: When changing a liquid to a solid thermal energy is removed for freezing.

• True

• False

Multiple Choice

True or False: When changing a liquid to a gas thermal energy is added for boiling.

• true

• false

Multiple Choice

Is digestion an example of a physical change or a chemical change?

• Physical Change
• Chemical Change

Multiple Choice

Is rust forming on a bike that has been left outside in the rain an example of a physical or chemical change?

• Physical Change
• Chemical Change

Multiple Choice

What are the states of matter?

• solid, liquid, and juice
• solid and liquid
• solid and gas
• solid, liquid, and gas

Multiple Choice

Molecules are closest together in a 

• Solid
• Liquid
• Gas
• plasma

Multiple Choice

A gas

• has a definite shape but no definite volume

• has a definite volume but no definite shape

• has no definite shape and a definite volume

• has no definite shape and no definite volume

Multiple Choice

Tasha made this model. In her model the bulb is not lit.

Which of these statements best explains why the bulb is not lit?

• The wires are connected to the wrong battery terminals.

• The bulb is burned out.

• The switch is open.

• A wire is missing.

Multiple Choice

Eileen tried each of these setups to make a working circuit.

In which setup would the bulb light?

• Setup A

• Setup B

• Setup C

• Setup D

Multiple Choice

Adam made a circuit. His light bulb did not light up. Which of these could NOT be the cause?

• open switch

• dead battery

• closed circuit

• loose connection

Multiple Choice

Ashley is classifying some objects as conductors or insulators. What is the difference between conductors and insulators?

• A conductor allows electrical current to flow through it easily, while an insulator does not.

• An insulator allows electrical current to move through it easily, while a conductor does not.

• A conductor has a static charge, while an insulator does not.

• An insulator is a metal, while a conductor is not a metal.

Multiple Choice

Annie classified some materials as insulators or as conductors. Which of the following materials did she list in the wrong column?

• air

• glass

• rubber

• saltwater

Multiple Choice

A battery or other device which provides energy for a circuit

• Conductor
• Power source
• Parallel circuit
• Complete circuit

Multiple Choice

Includes wires, a battery, and a device that uses energy. It works

• Series circuit
• Complete circuit
• Pathway
• Incomplete circuit

Multiple Choice

Which statement best describes a difference between static electricity and current electricity?

• Static electricity is human-harnessed energy while current electricity is natural energy.

• Static electricity is created energy while current electricity is spent energy.

• Static electricity is natural energy while current electricity is human-harnessed energy.

• Static electricity is positive energy while current electricity is negative energy.

Multiple Choice

Which description best identifies the cause of static electricity?

• a lack of any neutral charges

• a lack of any positive or negative charges

• an imbalance of positive and negative charges

• an exact balance of positive, negative, and neutral charges.

Multiple Choice

When two objects are rubbed together, some negatively charged particles from one object can be transferred to another object. What will happen if the objects have the same charge?

• They will create a spark.

• They will not act differently.

• They will attract each other.

• They will repel each other.

Multiple Choice

Which examples below describes naturally-occurring electricity?

• battery

• current electricity

• Quick release of energy

• Getting shocked when plugging in a vacuum cleaner

Multiple Choice

All circuits need to have a source of power and a load. What is a good example of a load?

• copper wire

• battery

• switch

• toaster

Multiple Choice

Why did the student include a light bulb in the design?

• The circuit will not work without it.

• The light bulb proves the circuit is working.

• The light bulb provides the energy for the circuit.

• The light bulb controls the flow of energy in the circuit.

Multiple Select

A student walks across the carpet and reaches for the metal doorknob and then receives a shock. This is an example of...

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

A student plugs in a computer to charge. This is an example of...

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

A dam generates electricity by converting power of water into electrical energy. This is an example of...

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

When you pull your laundry out of the dryer, the socks are sticking to the sweater. This is an example of...

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

This type of electricity is very unpredictable and random.

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

This type of electricity is used intentionally to make life easier for humans.

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

This type of electricity is very predictable.

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

This type of electricity uses a series of conductors and insulators to direct the current.

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Select

Lightning striking a building during a thunderstorm is an example of...

• Human Harnessed Electricity

• Naturally Occurring Electricity

• Static Electricity

• Current Electricity

Multiple Choice

The material best attracted by a magnet is ________________.

• silver
• copper
• iron
• glass

Multiple Choice

The Earth is a giant magnet.

• true
• false

Multiple Choice

You can control the strength of a permanent magnet.

• True

• False

Multiple Choice

What device uses a permanent magnet to show direction?

• compass

• generator

• temporary magnet

Multiple Choice

Electromagnets are what type of magnet?

• permanent

• temporary

• natural

Multiple Select

What types of devices use electromagnets?

• Junkyard Lifts

• Motors

• Electronics

• Compass

• Doorbell

Multiple Choice

The north and south poles of two magnets ______________ each other.

• a. have no reaction to
• b. move away from
• c. repel
• d. attract

Multiple Choice

I keep magnetism for a short amount of time. What am I?

• permanent magnet
• temporary magnet
• lines of force
• magnetism

Temporary Magnets

• Magnetic Field: Comes and Goes (Electromagnets)

• Has Poles: Yes

• Control Strength: Yes

• Can Be Turned On and Off: Yes