science ch 8
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| force | push or pull on an object
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| type A: contact | tension, elastic, friction
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| type B: at-a-distance | gravitational, electrostatic, magnetic
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| mass | (kg, g)
amount of matter in an object
always stays the same
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| weight | (N)
amount of force on an object due to gravity
changes depending on where you are in the universe
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| balanced forces | equal in strength
oppose each other in direction
keep object moving at constant speed and direction
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| unbalanced forces | cause change in speed or direction of an object
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| pressure | amount of force acting on an area or an object
increase pressure=smaller volume=particles closer together
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| formula for pressure | P = F/A
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| compression | decrease in volume from force
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| compressible: gasses? | yes, large amount of space between particles
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| compressible: liquids? | no, incompressible
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| compressible: solids? | no, incompressible
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| kinetic energy in gasses | when energy is added to a gas, the kinetic energy of the particles is increased
warmer gas expands faster that cooler gas
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| gas in pressurized containers (aerosols) | when aerosols are heated, pressure increases
fast-moving particles bounce against sides of container
could cause explosion
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| deformation | change of shape without being forced into smaller volume
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| unit for pressure | 1 N/m2 = 1 Pascal (Pa)
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| implosion | collapse inward
air pressure inside is lower than air pressure outside of container
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| viscosity | fluid's resistance to flow
liquid's viscosity decreases when heated, increases when cooled
gas's increases when heated, decreases when cooled
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| adhetion | attraction or joining two objects or fluids to each other
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| cohesion | the strength with which the particles of an object or fluid attract each other
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| viscosity: the effects of particle shapes | higher viscosity=more complicated shape of molecules
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| flow rate | speed at which fluid flows from one point to another
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| surface tension | property of a liquid in which the surface of it acts like a thin membrane or skin
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
majmun
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