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- 1. Multiple Choice
Kinetic and potential energies combined are called ____________.
thermal energy
mechanical energy
solar energy
gravity
- 2. Multiple Choice
A wind-up car has potential energy when the key is wound. It has kinetic energy because it will move. Together, it has ______________ energy.
solar
thermal
mechanical
sound
- 3. Multiple Choice
A BLUE magnet picks up twelve paperclips. A RED magnet picks up four paperclips. A PURPLE magnet picks up nineteen paperclips. Which magnet is the strongest?
blue
red
purple
- 4. Multiple Choice
A yo-yo can go up and down on the string. Is gravity the only thing making the yo-yo move? Why or why not.
Yes. Gravity makes the yo-yo go down.
No. Gravity may pull it down, but the yo-yo also is forced upward.
No. Gravity doesn't pull the yo-yo all of the way to the ground.
Yes. The yo-yo weighs too little.
- 5. Multiple Choice
Pushing and pulling are forces. If a child pushes on a toy, what concepts of forces explain why it moves across the floor?
The toy pushed equally as hard on the child and therefore did not move.
The toy moved towards the child.
The toy moved in the direction of the pushing force.
The toy was magnetically forced across the room.
- 6. Multiple Choice
A student did an experiment where they used cars, ramps, and friction of surfaces. Which of the following would be a good comparison?
Ramp 1: Car with small wheels, carpet surface
Ramp 2: Car with big wheels, hardwood surface
Ramp 1: Car with small wheels, carpet surface
Ramp 2: Car with small wheels, hardwood surface
Ramp 1: Car with big wheels, hardwood surface
Ramp 2: Car with big wheels, hardwood surface
Ramp 1: Car with small wheels, concrete surface
Ramp 2: Car with big wheels, concrete surface
- 7. Multiple ChoiceWhich of the examples below are examples of mechanical energy?pulling a wagonthe phone ringinga baby cryingchoir singing
- 8. Multiple ChoiceFriction is a force that acts in an ___________ direction of movement.similaroppositeparallelwest
- 9. Multiple ChoiceHow does friction affect speed?more friction decreases speedmore friction increases speedless friction decreases speed
- 10. Multiple ChoiceThe rougher the surface, the faster an object will travel over the surface.TrueFalse
- 11. Multiple ChoiceWhich of the following would increase the motion of a ball after it is kicked?a flat, grassy surfacea smooth surface sloped uphilla smooth surface sloped downhill
- 12. Multiple ChoiceA person is pushing a lawnmower. Which best describes what is occurring?Mass is being applied to the lawnmower.Force is being applied to the lawnmower.There is no friction acting on the lawnmower.There is no gravity acting on the lawnmower.
- 13. Multiple ChoiceTo make things move, you need a −force.strong magnet.metal object.helper.
- 14. Multiple ChoiceA force is a −push.pull.magnet.push or pull.
- 15. Multiple ChoiceWhat is true about all forces?They are magnetic.They push or pull.They are very strong.They only push.
- 16. Multiple ChoicePulling a wagon will most likely change all of the following EXCEPT its −motionpositiondirectionmass
- 17. Multiple ChoiceThe dirt road rubs against the tires of the motorcycle and most likely causes it to ―go faster because of frictionchange directionsgo slower because of frictionwin a race
- 18. Multiple ChoiceWhen the football player kicks the ball it will go up in the air. What will happen next?Gravity will pull it up higher.The football player will push it higher.It will fall back down to the ground because gravity pulled it.It will fall back down to the ground because gravity pushed it.
- 19. Multiple ChoiceGravity is a force that ─pulls objects down.pulls objects toward the center of the Earth.pushes objects into the air.has no effect on objects.
- 20. Multiple Choice
Why is it important to change only one variable at a time during an investigation?
Changing only one variable allows you to determine what it was that caused the resulting data.
Changing only variable takes too much time.
Changing only one variable at a time is not important.
When you only change one variable at a time, you are able to see how gravity affects the material.
- Answer choicesTagsAnswer choicesTags