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Q1 Post Test Review
A review of the physical science concepts from Q1
| Question | Answer |
|---|---|
| What is magnetism? | A non-contact force that forms around magnetic materials and attracts or repels. |
| What is gravity? | A non-contact force that happens around ALL objects with mass. |
| Describe how the force of gravity changes. | The closer something is, the more gravity it has. The more mass something has, the more gravity it has. |
| In the real world, things stop, they don't move forever. Why doesn't Newton's first law work? | On earth, energy is lost due to unbalanced forces like friction and air resistance that are working on objects. |
| How do we figure out the speed of something? | distance divided by time gives us speed (D/T=speed) |
| Speed is | how fast you are moving |
| Velocity is | your speed AND direction |
| What does a motor do? | change electrical energy to mechanical energy using an electromagnet |
| What does a generator do? | change physical energy into electrical energy using electromagnets |
| If something is not changing direction (it is moving without changing or it is sitting still) the forces are | balanced |
| If something is speeding up, slowing down, or turning the forces are | unbalanced |
| A car drives down the road. From whose reference point is the car not moving? | someone in the car |
| A car drives down the road. From whose reference point is the car moving? | someone outside of the car |
| When does gravity act on objects | all objects are impacted by gravity all of the time |
| An object's ______________ is the force of gravity pulling on the object. | weight |
| As object's ______________ does not change with gravity. | mass |
| If an object is moving in a straight line at a uniform speed, what can change its direction? | unbalanced force |
| Animals get energy to move and live from | chemical potential energy in food |
| Name one factor that changes the amount of electrical charge | distance |
| Electrical charges have the greatest potential energy when they are | close together |
| What changes the amount of magnetic force? | The distance from the magnet. |
| Name 2 things that can change the amount of gravitational potential energy. | mass and height |
| When is gravitational potential energy high? | When an object is farthest from the ground. |
| An apple falls out of a tree, from whose reference point is the apple moving away? | Someone in the tree. |
| another word for magnitude is | strength |
| _______________ slows objects down | friction |
| Electrical force changes due to | the charges of the particles and the distance between the particles |
| Jupiter is not touching the sun. Why is the Sun able to apply force to Jupiter? | Gravity is a non-contact force that can act over a distance. |
| What keeps all of the planets orbiting around the Sun? | Gravity, a non-contact force |
| You get socks out of the dryer. The socks have a negative charge, and your pants have a positive charge. What might happen? | Socks will stick to your pants. |
| To give something more elastic potential energy you should | stretch it lots |
| What type of energy is a pile of logs? | chemical potential energy. |
| Stored energy is called | potential energy. |
Created by:
MsLW
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