7th GradeMath Vocab Cards

Expression

Definition:numbers, variables, and

operations that are grouped together to show the value

of something

3x + 2 There are two terms in the expression 3x + 2.

Equation

Definition:a mathematical sentence

created by placing an equal sign "=" between two

expression

3x + 2 = 12Brynn solved the equation, then substituted her answer for x to make sure she was

correct.

Distribute

Definition:to multiply a term to two or more terms inside a set of

parentheses

If you distribute the number outside the parentheses, it will be easier to solve the

equation.

CoefficientDefinition:

the number in front of a variable

Leah added the coefficients in front of the variables to

combine like terms and simplify the expression.

Absolute Value

Definition:the distance between the

origin and the point representing the real

number

|-12|

The absolute values of 12 and -12 are the same

number because both are 12 hops from 0 on a number

line.

RatioDefinition:

a comparison of two quantities

Kevin was careful to use a consistent ratio of 3 parts yellow paint to 1 part blue

paint so that his colors would match.

Unit Rate

Definition:a ratio of two quantities with

different units and a denominator of 1

Owen compared the unit rates to see which box of cereal was the better deal.

ProportionDefinition:an equation stating that two

ratios are equal

Rylin knew the cost for 3 pounds of pasta, so she

used a proportion to find the cost for 6 pounds.

Proportional Relationship

Definition:as one amount increases,

another amount increases at the same rate

There was a proportional relationship between the number of hours and the total distance traveled.

Constant of Proportionality

Definition:the constant value of the ratio of two proportional

quantities

The equation y=3x has a constant of proportionality

of 3.

Scale Drawing

Definition:a drawing that is used to

represent an object that is too large or too small to be

drawn at actual size

https://www.talstern.com/image/440x320-scale-drawing-of-a-room-an-extreme-bedroom-makeover-process-1157104.jpeg

A’Marie created a scale drawing of her dream

house.

Percent of Change

Definition:the percent that a quantity changes from the original

amount

http://moziru.com/images/graph-clipart-data-result-1.jpg

The percent of change in her salary was a 5%

increase.

InterestDefinition:

money paid or earned for the use of money

https://photos.gograph.com/thumbs/CSP/CSP991/growth-of-money-clipart_k12168568.jpg

Kiowa had extra money in her account because the bank paid her interest.

Principal (Interest)

Definition:an amount of money

borrowed or deposited

Grace started with a principal of $1000 in her

account.

Rate (Interest)

Definition:a percent at which you earn

or pay back money

Katie got a great interest rate from M&T Bank

Time (Interest)

Definition:the number of years the

interest is applied

http://hddfhm.com/images/new-year-calendar-clipart-2.jpg

Elias plans to use the money he invested to go to

college in 2022, after 6 years of time has passed.

MarkupDefinition: amount the price of an item is increased so a profit can

be made

http://www.clker.com/cliparts/v/1/f/R/E/D/price-tag-hi.png

The girls applied a 25% markup to the school supply items they were selling and donated the profits to their Make A Difference charity.

Biased

Definition:a question that encourages a particular response or a

sample that is not representative of a

population

If you ask which NFL team is the best while attending

an Eagles game, your results could be biased.

https://www.linkedin.com/pulse/homogeneous-rod-fraser

Unbiased

Definition:a neutral question or a

random sample that is a large enough representation

of a population

https://www.clker.com/clipart-smaller-crowd-rdc-color.html

Edwin worded his survey questions carefully to make

sure they were unbiased.

Likelihood Definition:the chance that something

will happen

https://www.bigideasmath.com/teachers/crosswalk/accelerated_10_2.pdf

https://www.bigideasmath.com/teachers/crosswalk/accelerated_10_2.pdf

The likelihood is low that James will pull a face card

from the deck.

Theoretical Probability

Definition:the probability of the number of favorable

outcomes to the number of possible outcomes; what

should happen

http://www.paperspencils.com/2016/11/13/cointoss-a-200-word-rpg/

The theoretical probability of flipping heads is ½ or 50%, but if you flip a coin

twice you could get all heads.

Experimental Probability

Definition:the probability that is based on the repeated trials of an

experiment; what does happen

If Joe got Red, Red, Red, Yellow, Blue on his spinner,

then the experimental probability of spinning red

is ⅗.

OutcomesDefinition:

the possible results of an experiment

When flipping a coin twice, your outcomes could be HH,

HT, TH, or TT.

https://www.slideshare.net/umairsimjee/probability-theory-50295964

Radius Definition:the distance from the center

of a circle to any point on the circle

McKenna found that the distance across her circle

was 10 cm, so the radius of her circle was 5 cm.

Diameter Definition:the distance across a circle

through the center

The diameter of the car rim was 16 inches.

Circumference Definition:the distance around a circle

http://www.tutorvista.com/content/math/circumference-of-a-circle/

Madi planned to put pavers around her circular flower garden, so she found its

circumference to estimate how many she should buy.

Surface AreaDefinition:the total area of the surface

of a three-dimensional object

http://calculator.tutorvista.com/math/40/surface-area-of-a-cube-calculator.html

Making a paper net helped Joe to find the surface area

of the prism.

Lateral Surface Area

Definition:the total area of the surface

of a three-dimensional object, excluding the area of

the base(s)

https://www.riteaid.com/shop/campbells-soup-condensed-chicken-noodle-10-75-oz-305-g-0026639

Faith calculated the lateral surface area of the cylinder

to determine how much paper was needed for the

soup label.

Volume

Definition:a measure of the amount of

space that a three-dimensional figure

occupies

https://www.khanacademy.org/math/basic-geo/basic-geo-volume-sa/volume-rect-prism/v/how-we-measure-volume

Aiden found the volume of the rectangular prism by multiplying length times

width times height.