CCA 3rd NW Review

Friction causes objects to

• Stop

• Slow down

Multiple Choice

Materials with ____ surfaces have less friction. This means that they travel faster.

• smooth

• rough

• both

Multiple Choice

Rougher surfaces have ___ friction. This means that they are more likely to slow down or stop.

• greater

• less

• no

Poll

The rougher the surface, the faster an object will travel over the surface.

• True

• False

Multiple Choice

Will a toy car slow down quicker on carpet or foil?

• Carpet because it is a rough surface and has more friction.

• Carpet because it is a rough surface and has less friction.

• Foil because it is a smooth surface and has more friction.

• Foil because it is a smooth surface and has less friction.

Multiple Choice

Why does ice have less friction?

• Because it is frozen water.

• Because it is a smooth surface.

• Because it is cold.

• Because it is a rough surface

Open Ended

Imagine you are going down a slide. Would you go down faster if the slide was made of metal or wood? Why?

I would go faster if the slide was ___ because ___.

Open Ended

Students conduct an investigation by rolling a car down a ramp covered with four different surfaces, while measuring the time it takes for the car to travel from the top of the ramp to the bottom of the ramp. The results are shown in the graph.

Which surface causes the LEAST amount of friction?

Multiple Choice

Which of the following items is / are conductors?

• Wool

• Copper

• Plastic

• Glass

Multiple Choice

What is the difference between a conductor and an insulator?

• An insulator allows electricity to flow through easily and a conductor does not.

• An insulator is magnetic and a conductor is not

• A conductor allows electricity to flow through easily and an insulator does not.

• A conductor is magnetic and an insulator is not.

Multiple Choice

2.  Electrical energy can change forms.  When you turn on a light switch, electricity travels through the wires to a light bulb.  The light bulb then changes the electrical energy into _____ energy.

• Sound

• Light

• Magnetic

• Mechanical

Multiple Choice

Cooking on the stove is an example of what type of energy?

• Mechanical

• Kinetic

• Thermal

• Electrical

Multiple Choice

Turing my lamp on in the bedroom is an example of what type of energy?

• Electrical

• Mechanical

• Kinetic

• Sound

Multiple Choice

What are insulators?  

• A conductor is a material that allows electric charge to move through it as an electric current. Usually the charge is carried by electrons, and the conductor is a metal.
• An object that is really, really, really, and I mean really truely, awesome.
• A material or an object that does not easily allow heat, electricity, light, or sound to pass through it. Air, cloth and rubber are good electrical insulators; feathers and wool make good thermal insulators. Compare conductor.

Multiple Choice

What are Conductors?

• A conductor is a material that allows electric charge to move through it as an electric current. Usually the charge is carried by electrons, and the conductor is a metal.
• an insulator
• an conductor 
• A material or an object that does not easily allow heat, electricity, light, or sound to pass through it. Air, cloth and rubber are good electrical insulators; feathers and wool make good thermal insulators. Compare conductor.

Multiple Choice

Why are metals useful for making electrical wire?

• Metals do not bend.
• Metals hold much heat.
• Metals are insulators.
• Metals are conductors.

Multiple Choice

What would best complete this circuit?

• A wire

• A switch

• A battery

• A light bulb

Multiple Choice

How could you make this circuit work?

• Close the switch

• Take out the bulbs

• Add another battery

• Add another bulb

Multiple Choice

Which investigation will best determine if the statement is true?

• Place one plastic and one metal toy car in the freezer for 5 minutes. Touch the cars to determine which is warmer.

• Place one plastic and one metal toy outside in the sun. Use a thermometer to measure the temperature of both cars and compare the temperatures of the plastic car to metal car.

• Place many types of plastic and metal cars in the freezer for 30 seconds. Touch each of the cars to compare the temperatures of the plastic cars to the metal cars.

• Place many types of plastic and metal toy outside in the sun. Use a thermometer to measure the temperatures of the plastic toys to the metal toys.