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Physical Sci
| Question | Answer |
|---|---|
| the resistance of 2 objects rubbing against each other | friction |
| smooth surface: | less friction; will roll farther |
| rough surface: | more friction; will not roll far |
| an invisible force that pulls objects | gravity |
| objects touching. example: friction, springs | contact force |
| objects not touching. example: gravity, magnet | non-contact force |
| not moving/zero Newtons | balanced force |
| is moving | unbalanced |
| energy in motion | kinetic energy |
| stored energy/not moving | potential energy |
| keeps properties, is easily separated | mixture |
| properties do change, harder to separate, dissolves | solution |
| rate of dissolvement: | 1.stir, 2. crush, 3. use hot water to dissolve something more quickly |
| a substances ability to dissolve | solubility |
| substance that DOES dissolve. example: sugar, salt | solute |
| dissolves other substances. example: water | solvent |
| if something needs to be more concentrated... | add solute |
| if something needs to be less concentrated.. | add solvent |
| when a new substance is created | chemical change |
| a change in shape, size or state of matter | physical change |
| changes occurring in a chemical change: | odor, color change, bubbles, energy released/absorbed |
| examples of chemical change | rust, smell, grill, cook, burn, mold |
| examples of physical change | cut, tear, bend, melt, evaporation, boiling |
| properties of matter | solid, liquid, gas |
| an objects ability to sink or float | density |
| magnetism: | iron, cobalt, steel, nickel "I Can See Nick" |
| Hardness: 1= __________, 10 = __________ | 1 = Softest, 10 = hardest, "Moh's Hardness Scale" |
| stored energy when materials stretch or compress(rubberband) | elastic |
| energy stored in a substance due to chemical bonds(a match) | chemical |
| energy stored when an object is in an elevated position | gravitational |
| increasing the speed | acceleration |
| standard unit of force | newton |
| sum of all forces acting on an object | net force |
| 1st law of motion aka law of inertia | an object at rest will stay at rest and an object in motion will stay in motion unless acted on by an unbalanced force |
| 2nd law of motion | the greater the mass of an object, the greater the amount of force is needed to move an object |
| 3rd law of motion | for every action, there is an equal and opposite reaction |
Created by:
eeboonek12
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