Unit 2 Vocabulary
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 | When one objects distance from another is changing
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| SPEED | The distance an object travels per unit of time. D/T
Ex. 50 m/p/hr
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| REFERENCE POINT | A place or object used for comparison to determine if something is in motion
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| FORCE | A push or pull on an object
- strength and direction
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| SPRING SCALE | This is used to measure force
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| NEWTON (n) | A unit used to measure force (n)
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| FRICTION | A force that resists the motion of one object sliding over another
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| VELOCITY | Speed in a given direction
Ex. 30ft per/sec West
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| SLIDING FRICTION | Two solid surfaces sliding over each other
Ex. pushing a box on a floor
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| STATIC FRICTION | Friction that acts on objects that are not moving
Ex. a book on a ramp
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| ROLLING FRICTION | When an object rolls over a surface
Ex. cart, bike
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| GRAVITY | A force that pulls objects towards each other
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| WEIGHT | Strength of the gravitational force
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| ACCELERATION | The rate at which velocity changes
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| BALANCED FORCES | Equal forces acting on one object in opposite directions.
Ex. Pushing on a box equally: 5N → ❒ ← 5N, this will give you a Net force of 0.
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| UNBALANCED FORCES | Unbalanced forces cause an object to start moving, stop moving, or change direction.
Ex. Pushing on a box with more force on one side: 10N ⎯→ ❒ ← 5N, this will give you a Net force of 5.
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| WHAT is NEWTON'S 1st LAW of MOTION? | An object at rest will remain at rest and an object moving at a constant velocity will remain at a constant velocity UNLESS it is acted upon by unbalanced forces.
Ex. A ball moving that hits a wall, a pencil moves when you pick it up.
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| INERTIA | Tendency to resit a change in motion.
Ex. Running and stopping, tennis ball in a circle, stopping a car.
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| SATELLITE | Any object that orbits (goes around) another object in space.
Ex. planets & the moon are natural satellites
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| What is the MEAN of a set, or group of numbers? | The average number - found by adding all the numbers in a group/set & dividing by the sum by the numbers you started with.
Ex. Add the set 2, 4, 6, 8 it =20 - now divide 20 by the number of numbers you added, which is 4. Your Mean or Average is 5.
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| What is the MEDIAN of a set, or group of numbers? | The middle number when a group/set of numbers is listed in order from least to greatest.
Ex. In the group/set of 2, 4, 6, 8, 10, The middle or MEDIAN number is 6.
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| What is the MODE of a set, or group of numbers? | The number that occurs most often in a set/group of numbers.
Ex. In the group/set of 2, 4, 5, 5, 7, 8,8, 8 - The MODE, or the number that occurs the most is 8.
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| What is the RANGE of a set, group of numbers? | The difference between the greatest value and the least value in a set of data.
EX. In the set 2, 4, 6, 8 you would subtract 2 from 8 to get the RANGE which is 6.
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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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