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Science REVIEW
Science 2nd 9 wks Study Guide
| Question | Answer |
|---|---|
| seesaw- simplemachine | lever |
| when the net force equals 0 | balanced |
| a change that does change the substance | chemical |
| an object at rest tends to stay at rest | inertia |
| a solid changing to a gas | sublimation |
| zipper- simple machine | wedge |
| a change that does not change the substance | physical |
| speed in a given direction | vlocity |
| solid to a liquid` | melting |
| NaCL | salt |
| distance divided by time | speed |
| zero on the kelvin scale | absolute 0 |
| rate at which velocity changes | acceleration |
| transferor heat from one particle of matter to another | conduction |
| the rule that energy cannot be created or destroyed | conservations of energy |
| transfer of heat by the movement of currents within a fluid | convection |
| fixed point around which a lever pivots | fulcrum |
| states that an object at rest will remain at rest and an object in motion will continue moving at a instant velocity unless acted upon y an unbalanced force | newton's 1st law |
| acceleration depends on the objects mass and on the net force acting on the object | newtons 2nd law |
| one object exerts a force on another object, then the second object exerts a force equal to strength in the opposite direction on the 1st object | newtons 3rd law |
| force that pulls objects toward each other | gravity |
| tendency of an object to rest change in motion | inertiea |
| energy that an object has due o its motion | kinetic |
| rate at which one form of energy is transformed into another; rate at which work is done | power |
| stored energy that results from the position or shape of an object | potential energy |
| transfer of heat by electromagnetic waves | radiation |
| what would be three examples of conduction | touching a stove, squeezing ice into your hand, walking on san don a hot sunny day |
| what object heats up faster out of the objects wood, bass, plastic, and steel | steel |
| which object would take the longest to heat up out of these things wood, glass, steel, plastic | plastic |
| Who does insulating your house help in the winter | keeps heat in and cold out |
| how does a liquid thermometer work | the alcohol rises/ falls as convection currents touch the glass tube |
| what are the 6 forms of energy | chemical, thermal, electromagnetic, nuclear, mechanical, electrical |
| Describe the mass and weight of a person on earth compared to the mass and weight of a person in space | mass is the same and weight is different |
| give 3 examples of single energy transfer | toaster, cellphne, running |
| Why does the handle of a spoon get hot while sitting in steaming tea | conduction makes the particle sin the spoon to move faster |
| What would be three examples of convection | sea breeze, air conditioning unit, flying a kite |
| How does the mass of an object effect the gravity of the object | larger the mass, the more gravity an object has |
| when you heat an object, what happens to the particles of that object | the particles vibrate faster; expanding |
| give 3 examples of potential energy | book on a shelf, wall, desk |
| name three materials that would make good insulators | thick coat, insulation in your house, blanket |
| what two simple machines are used in a shovel | wedge lever |
| when an object is tossed straight up in the air, here is the potential energy the greatest? | at the highest point |
| Which form of energy would you have the greatest energy from the smallest amount of material | nuclear |
| what changes when a car moes through a curve | it accelerates through the curve |
| give three example sod inertia | book on table, stopping at a red light quickly, sliding into base |
| how does burning gasoline convert energy | chemical energy changes to mechanical energy |
| The material ? has a tremendous amount of potential energy (nuclear) | uranium |
| inertia is the reason we have ? and ? in cars | seatbelts, airbags |
| if the force of an object in motion continues to ? in a ? line and a ? speed until acted upon by an outside force | move, straight, constant |
| a rocket launch would be an example of newton's ? law | 3rd |
| to stop a bicycle, you would use ? friction | sliding |
| the amount of ? a machine can do in a given ? is efficiency | work, time |
| if the force of an object doubled, the acceleration of the object would? | double |
| your arm is ?. the muscle provides the ? and your ? would be the fulcrum | lever, input foce, elbow |
| a ball at the top of a ramp has ? energy | potential |
| flies through the air at an arch or angle | projectile |
| example of projectile | dropping an object from a plane |
Created by:
ewoodham
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