science test
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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| motion | an objects change in position relative to a reference point
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| speed | the distance traveled by an object divided by the time taken to travel the distance
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| velosity | the speed of an object in a particular direction. must include reference direction*velosity changes if speed or direction changes*
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| acceleration | the rate at which velocity changes. object accelerates if its speed direction or both change
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| forces | a push or pull on an object. newtons (N)
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| net force | the combination of all the forces acting on an object
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| balanced forces | when the forces on an object produce a net force of 0n
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| unbalanced forces | when the net force on an object is not 0n
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| friction | a force that opposes motion between two surfaces that are in contact
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| greater the force = | greater the friction
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| rougher the surface = | greater the friction
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| kinetic friction = | moving friction
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| what are two types of kinetic friction? | sliding and rolling friction
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| static friction | not moving friction
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| ways to reduce friction | adding lubricants (oil or wax) switching from sliding to rolling friction making the surfaces smoother
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| ways to increase friction | make the surface rougher or to increase force
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| gravity | a force of attraction between objects that is due to their masses
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| all matter is affected by what? | gravity, all objects experience an attraction towards other objects (depends on mass)
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| force must be applied to overcome what? | to overcome gravitational force
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| newtons law of universal gravitation | all objects in the universe attract each other through gravitational force, the size of force depends on the mass and the distance between the objects
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| part 1 | gravitational force increases as mass increases
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| part 2 | gravitational force decreases as distance increases
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| weight | a measure of gravitational force on an object
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| mass | the amount of matter in an object
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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.
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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:
maddybrz
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