## optic

an

__optical__illusion†optical = relating to sight or light

## Word Statistics

Library | 3 uses in 10 avg bks |

## elegant

## as in:

**as elegant equation**

It is an

__elegant__solution that will reduce complexity and save material.elegant = a solution that is simpler (and often more comprehensive) than most would anticipate

## Word Statistics

Library | 10 uses in 10 avg bks |

## simulate

A computer model is used to

__simulate__the effects of wind.simulate = imitate or represent

## Definition

Generally*simulate*means:

make an imitation or representation of

## Word Statistics

Library | 6 uses in 10 avg bks |

SAT^{®} | top 500 |

## parameter

I enjoy writing for the paper, but I wish my work wasn't bound by such tight

__parameters__.†parameters = a fixed limit that establishes how something should be done

## Word Statistics

Library | 1 uses in 10 avg bks |

SAT^{®} | top 1000 |

## ratio

There is much interesting study on the predictive value of the

__ratio__of the length of the index finger to the ring finger within a given gender and race.ratio = relative lengths

## Definition

Generally*ratio*means:

the relative magnitudes of two quantities — often expressed as

*a*:*b*(which could also be expressed as the fraction*a*/*b*)## Word Statistics

Library | 3 uses in 10 avg bks |

SAT^{®} | top 1000 |

## assess

## as in:

**assess the situation**

They

__assessed__the property's value at $500,000.assessed = considered and judged

## Definition

Generally this sense of*assess*means:

consider something and make a judgment

## Word Statistics

Library | 4 uses in 10 avg bks |

SAT^{®} | top 1000 |

## continuous

The national power grid is under almost

__continuous__attack.continuous = constant (uninterrupted)

## Definition

Generally*continuous*means:

continuing in time or space without interruption or irregularity

## Word Statistics

Library | 8 uses in 10 avg bks |

## optimal

It is the

__optimal__solution.†optimal = most desirable possible — often given the circumstances

## Word Statistics

Library | 1 uses in 10 avg bks |

## radiation

Ionizing

__radiation__has enough energy to ionize atoms or molecules.radiation = particles emitted by nuclear decay (i.e., particles smaller than an atom that are sent out due to radioactivity)

## Word Statistics

Library | 5 uses in 10 avg bks |

## inclusive

## as in:

**10 to 20 inclusive**

I was grouped with students who scored 53% to 64%

__inclusive__.inclusive = including stated limits

## Word Statistics

Library | 0 uses in 10 avg bks |

## contract

## as in:

**the metal contracted**

When it is cold, the bridge

__contracts__and the joints are further apart.contracts = gets shorter or smaller

## Definition

Generally this sense of*contract*means:

when something gets shorter or smaller

## Word Statistics

Library | 9 uses in 10 avg bks |

SAT^{®} | top 1000 |

## dynamic

## as in:

**a dynamic personality**

a

__dynamic__speaker†dynamic = being energetic or enthusiastic — often inspiring others

## Word Statistics

Library | 1 uses in 10 avg bks |

SAT^{®} | top 1000 |

## equilibrium

Panic threw the stock market out of

__equilibrium__.†equilibrium = a stable situation in which forces are in balance

or:

a person's sense of physical or (more rarely) emotional balance

or:

a person's sense of physical or (more rarely) emotional balance

## Word Statistics

Library | 2 uses in 10 avg bks |

## equivalent

At $50 a share, it is

__equivalent__to about a billion dollars.equivalent = being equal or essentially equal

## Word Statistics

Library | 7 uses in 10 avg bks |

SAT^{®} | top 1000 |

## algorithm

We wrote a computer

__algorithm__to find words that would interest you.†algorithm = a precise rule (or set of rules) specifying how to solve some problem

## Word Statistics

Library | 1 uses in 10 avg bks |

## schema

It is a useful

__schema__for discussing perception and understanding.†schema = a representation of a complex system

## Word Statistics

Library | 1 uses in 10 avg bks |

## methodology

a proven research

__methodology__†methodology = a system of principles and procedures for doing or studying something

## Word Statistics

Library | 0 uses in 10 avg bks |

## polymer

Cellulose is a natural

__polymer__.†polymer = a compound consisting of large molecules made up of a linked series of repeated smaller molecules (simple monomers)

## Word Statistics

Library | 0 uses in 10 avg bks |

## indicate

These maps are drawn with north to the top unless otherwise

__indicated__.indicated = pointed out (shown)

## Definition

Generally*indicate*means:

to show (point out, demonstrate, express, or suggest)

## Word Statistics

Library | 38 uses in 10 avg bks |

SAT^{®} | top 10 |

## symposium

I'm excited to attend the

__symposium__on robotics.symposium = a gathering to discuss a specific subject — generally with shared and breakout sessions in which individual or panels of experts address audiences

## Word Statistics

Library | 1 uses in 10 avg bks |

## criteria

We're considering five primary

__criteria__as we compare job applicants.criteria = reference points against which things can be evaluated

## Word Statistics

Library | 2 uses in 10 avg bks |

SAT^{®} | top 1000 |

## sequential

She has a gift for breaking a complex task into a simple series of

__sequential__steps.sequential = happening in a specific order — especially chronological order

## Word Statistics

Library | 6 uses in 10 avg bks |

SAT^{®} | top 1000 |

## phenomenon

It is a growing social

__phenomenon__on high school campuses.phenomenon = something that can be seen and is of special interest

## Definition

Generally*phenomenon*means:

something that exists or happened — especially something of special interest — sometimes someone or something that is extraordinary

## Word Statistics

Library | 7 uses in 10 avg bks |

SAT^{®} | top 100 |

## mean

We have a

__mean__annual rainfall of 23 inches.mean = average

## Definition

Generally this sense of*mean*means:

the average number

For example, the mean of 1 & 3 is 2.

More generally, the mean of n numbers is computed by dividing the sum of the numbers by n; for example, the mean of 1, 2, and 6

= (1+2+6) / 3

= 9 / 3

= 3

For example, the mean of 1 & 3 is 2.

More generally, the mean of n numbers is computed by dividing the sum of the numbers by n; for example, the mean of 1, 2, and 6

= (1+2+6) / 3

= 9 / 3

= 3

## Word Statistics

Library | 0 uses in 10 avg bks |

SAT^{®} | top 1000 |

## median

__median__household income†

median = the middle value of an ordered set of values (or the average of the middle two in a set with an even number of values)

The median of 2,4,7,7 is 5.5.

The median of 2,4,7,7 is 5.5.

## Word Statistics

Library | 1 uses in 10 avg bks |

## mode

The most frequent class size (or the

__mode__) is 20 students.†mode = the most frequent value of a collection of values; for example: 7 in the series 1,1,2,4,7,7,7,9,13,29

## Word Statistics

Library | 7 uses in 10 avg bks |

SAT^{®} | top 1000 |

## enhance

This sauce will

__enhance__the flavor of the meat.†enhance = increase quantity or quality

## Word Statistics

Library | 4 uses in 10 avg bks |

SAT^{®} | top 1000 |

## approximate

The state has

__approximately__as many Republicans as Democrats.approximately = about (but not exactly)

## Definition

Generally*approximate*means:

almost, but not exact; or similar

## Word Statistics

Library | 9 uses in 10 avg bks |

SAT^{®} | top 1000 |

## linear

a

__linear__measurementlinear = relating to a line

## Definition

Generally*linear*means:

relating to a line

or:

describing a proportional relationship that can be graphed with a straight line (described mathematically as an equation whose terms are of the first degree)

or:

more rarely: a straightforward sequence such as "linear thinking"

or:

describing a proportional relationship that can be graphed with a straight line (described mathematically as an equation whose terms are of the first degree)

or:

more rarely: a straightforward sequence such as "linear thinking"

## Word Statistics

Library | 1 uses in 10 avg bks |

## simultaneous

It is published in

__simultaneous__print and electronic editions.simultaneous = at the same time

## Word Statistics

Library | 12 uses in 10 avg bks |

SAT^{®} | top 1000 |

## diffuse

When the United States focused on terrorism, the movement went further underground and became more

__diffuse__.diffuse = spread out

## Definition

Generally*diffuse*means:

to spread; or to soften or calm

or:

to be spread out (not concentrated) — sometimes implying a lack or organization or the use of too many words

or:

to be spread out (not concentrated) — sometimes implying a lack or organization or the use of too many words

## Word Statistics

Library | 3 uses in 10 avg bks |

## static

He was raised in a

__static__village community where most people farmed in the same manner as their grandparents.static = not changing

## Definition

Generally this sense of*static*means:

not moving or not changing

## Word Statistics

Library | 8 uses in 10 avg bks |

SAT^{®} | top 1000 |

## coefficient

2 meanings

## as in:

**2x or y(a+b)**

Divide by 2 to eliminate the leading

__coefficient__.coefficient = mathematics: a number that is multiplies a variable in an expression (such as 2 in 2x)

or:

mathematics: any factor of a term (such as y in y(a+b))

or:

mathematics: any factor of a term (such as y in y(a+b))

## Word Statistics

Library | 0 uses in 10 avg bks |

##
as in:

**coefficient of thermal expansion**

Determine the

__coefficient__of friction between the two objects.coefficient = physics: a constant number that serves as a measure of some property or characteristic (such as the coefficient of thermal expansion)

## Word Statistics

Library | 0 uses in 10 avg bks |

## correspond

4 meanings

## as in:

**corresponding time period**

Eskimos have many words that

__correspond__to the English word*snow*. For example, there are different words for "snow on the ground", "fresh snow on the ground", "soft snow on the ground", "a crust of snow on the ground" and so forth.correspond = are equivalent

## Definition

Generally this sense of*correspond*means:

connect or fit together by being equivalent, proportionate, or matched

(Two things are equivalent if they have the same or very similar value, purpose, or result.)

(Two things are equivalent if they have the same or very similar value, purpose, or result.)

## Word Statistics

Library | 4 uses in 10 avg bks |

SAT^{®} | top 100 |

## as in:

**corresponding by email**

We

__correspond__regularly via email.correspond = write to each other

## Definition

Generally this sense of*correspond*means:

communicate by writing letters or email

## Word Statistics

Library | 4 uses in 10 avg bks |

## as in:

**a correspondence course**

She took a

__correspondence__course while she was in prison.correspondence = done from afar via written communication

## Definition

Generally this sense of*correspondence*means:

done from afar

## Word Statistics

Library | 3 uses in 10 avg bks |

## as in:

**foreign correspondent of the paper**

Let's get a report from our

__correspondent__in Mexico City.correspondent = reporter

## Definition

Generally this sense of*correspondent*means:

a reporter — typically from a foreign country or with a particular expertise

## Word Statistics

Library | 1 uses in 10 avg bks |

## transparent

## as in:

**transparent shower door**

The

__transparent__shower door shows water spots.transparent = capable of being seen through with clarity

## Definition

Generally this sense of*transparent*means:

able to be seen through with clarity

## Word Statistics

Library | 3 uses in 10 avg bks |

SAT^{®} | top 1000 |

## opaque

## as in:

**opaque shower door**

They are engineering a window that can convert from transparent to

__opaque__with the push of a button.opaque = not able to see through at all

## Word Statistics

Library | 2 uses in 10 avg bks |

## translucent

I could see a vague form through the

__translucent__glass.translucent = almost transparent; allowing light to pass through diffusely

## Word Statistics

Library | 5 uses in 10 avg bks |

## denotes

The asterisk ("*")

__denotes__a footnote.denotes = indicates

## Definition

Generally*denotes*means:

means literally; or indicates

## Word Statistics

Library | 1 uses in 10 avg bks |

SAT^{®} | top 1000 |

## combustion

internal

__combustion__engine†combustion = the act of burning

## Definition

Generally*combustion*means:

the act of burning

or metaphorically:

a state of violent disturbance and excitement

or metaphorically:

a state of violent disturbance and excitement

## Word Statistics

Library | 2 uses in 10 avg bks |

## finite

We are a wealthy country, but we still have to wisely allocate

__finite__resources.†finite = limited or with boundaries

## Word Statistics

Library | 1 uses in 10 avg bks |

SAT^{®} | top 1000 |

## propagate

## as in:

**propagate the idea**

The spread of the Roman Empire helped to

__propagate__the idea throughout Europe.propagate = spread

## Definition

Generally this sense of*propagate*means:

to spread

## Word Statistics

Library | 0 uses in 10 avg bks |

## subsequent

Her guess was proven right by

__subsequent__developments.subsequent = following

## Definition

Generally*subsequent*means:

following something else

## Word Statistics

Library | 4 uses in 10 avg bks |

SAT^{®} | top 1000 |

## hydraulic

The train uses

__hydraulic__brakes.hydraulic = relating to liquid — often describing machinery as moved by pressurized liquid

## Word Statistics

Library | 1 uses in 10 avg bks |

## flexible

The job has

__flexible__working hours.flexible = adaptable to different conditions

## Definition

Generally*flexible*means:

bendable or adaptable in various senses:

- easily bent without physical damage or injury — as of a hose or gymnast
- able to adjust readily to different conditions — as of a plan
- willing to make concessions — as of a boss

## Word Statistics

Library | 4 uses in 10 avg bks |

SAT^{®} | top 1000 |

## discrete

We collected data from three

__discrete__studies.discrete = separate or distinct

## Word Statistics

Library | 1 uses in 10 avg bks |

## essential

The

__essential__feature of the pen is that it writes so consistently.essential = absolutely necessary; or of greatest importance

## Definition

Generally*essential*means:

absolutely necessary; or of the greatest importance

or:

the defining or most important aspect of something

or:

the defining or most important aspect of something

## Word Statistics

Library | 20 uses in 10 avg bks |

SAT^{®} | top 500 |

## matrix

a

__matrix__of connective tissue†matrix = a rectangular array of elements (or entries) set out by rows and columns

## Word Statistics

Library | 2 uses in 10 avg bks |

## innovate

Apple is considered one of the most

__innovative__companies.innovative = introducing things that are new and different

## Definition

Generally*innovate*means:

bring something new to an environment

## Word Statistics

Library | 3 uses in 10 avg bks |

SAT^{®} | top 1000 |

## relevant

It is easier to learn things that seem

__relevant__to your life.relevant = related in a meaningful way to the issue in question

## Definition

Generally*relevant*means:

relating in a meaningful way to the issue in question

## Word Statistics

Library | 5 uses in 10 avg bks |

SAT^{®} | top 10 |

## component

It has only three major

__components__.components = parts

## Definition

Generally*component*means:

a part of something

## Word Statistics

Library | 5 uses in 10 avg bks |

SAT^{®} | top 1000 |

## hardware

We think it's a

__hardware__failure.†hardware = the physical part of a computer system

## Word Statistics

Library | 1 uses in 10 avg bks |

## software

We spend more on

__software__than hardware.software = written programs stored in computer hardware (physical components of a computer) which instruct the hardware on what tasks to perform

## Word Statistics

Library | 3 uses in 10 avg bks |

## constraint

Both sides have demonstrated a lack of

__constraint__in the discussions.constraint = staying within limits (in this case restraining themselves from saying things that make it hard to work together)

## Definition

Generally*constraint*means:

something that limits something's motion or someone's actions; or the state of being so limited

## Word Statistics

Library | 1 uses in 10 avg bks |

SAT^{®} | top 1000 |

## laser

The nightclub has a

__laser__light show.†laser = an optical device that produces an intense monochromatic beam of coherent light

## Word Statistics

Library | 7 uses in 10 avg bks |

## synthesis

His operas are the

__synthesis__of music and drama in perfect harmony.†synthesis = the combination of components into a complex whole

## Word Statistics

Library | 1 uses in 10 avg bks |

## frontier

## as in:

**the frontier of brain science**

She wants to extend the

__frontiers__of voice-controlled computer applications.frontiers = the most recent understandings and achievements in a changing field

## Word Statistics

Library | 2 uses in 10 avg bks |

## comprised

The university is

__comprised__of six colleges.comprised = made up of (composed of)

## Definition

Generally*comprised*means:

made up of (composed of); or included

## Word Statistics

Library | 4 uses in 10 avg bks |

SAT^{®} | top 1000 |

## amplitude

The amplifier to increase the

__amplitude__of sound waves.†amplitude = greatness of magnitude or range — especially the height of a wave

## Word Statistics

Library | 0 uses in 10 avg bks |

## artificial intelligence (AI)

It is an

__artificial intelligence__program to help diagnose disease.†artificial intelligence = a branch of computer science developing software that mimics human intelligence

## Word Statistics

Library | 0 uses in 10 avg bks |

## thermodynamics

The first and second laws of

__thermodynamics__are the ones that are best known.†thermodynamics = the branch of physics concerned with the conversion of different forms of energy

## Word Statistics

Library | 0 uses in 10 avg bks |

## vertical

The architect used long

__vertical__lines to pull the eye upward.vertical = oriented straight up and down (90 degrees relative to the floor)

## Word Statistics

Library | 7 uses in 10 avg bks |

## horizontal

Paintings in which

__horizontal__lines dominate, tend to be relaxing.horizontal = in line with the floor, horizon, or another flat base

## Word Statistics

Library | 5 uses in 10 avg bks |

## diagonal

The artist used

__diagonal__lines to create tension.†diagonal = a straight line connecting opposite corners of a rectangle; or any slope that could connect the corners of an imaginary rectangle that has one side parallel to the floor

## Word Statistics

Library | 4 uses in 10 avg bks |

## nanotechnology

She is studying

__nanotechnology__with a specialty in molecular self-assembly.†nanotechnology = the branch of engineering that deals with things smaller than 100 nanometers — especially with the manipulation of individual molecules

## Word Statistics

Library | 0 uses in 10 avg bks |

## synthetic

The couch is covered with

__synthetic__leather.synthetic = artificial (man-made rather than natural)

## Definition

Generally*synthetic*means:

artificial (man-made rather than natural)

or more rarely:

apparent, but not genuine

or more rarely:

apparent, but not genuine

## Word Statistics

Library | 2 uses in 10 avg bks |

## quantum

A photon is sometimes referred to as a "light

__quantum__."†quantum = physics: the smallest indivisible quantity of something — especially energy

## Word Statistics

Library | 1 uses in 10 avg bks |

## solvent

## as in:

**the company is not solvent**

The company is no longer

__solvent__.solvent = capable of meeting financial obligations

## Word Statistics

Library | 1 uses in 10 avg bks |

## devise

She plans to

__devise__something to launch water balloons.devise = come up with (invent or create)

## Definition

Generally this sense of*devise*means:

to come up with a way of doing something — typically a creative idea or plan

## Word Statistics

Library | 8 uses in 10 avg bks |

SAT^{®} | top 500 |

## calculus

She placed out of

__calculus__in college.calculus = the branch of mathematics that is concerned with continuously changing values

## Definition

Generally this sense of*calculus*means:

any system or process used to calculate values or to reason

or:

the branch of mathematics that is concerned with continuously changing values

or:

the branch of mathematics that is concerned with continuously changing values

## Word Statistics

Library | 3 uses in 10 avg bks |

## diffraction

They use X-ray

__diffraction__to scan luggage at the airport.†diffraction = an effect on light when it passes an obstacle such as an opaque edge; or (more rarely) a similar effect on other waves/particles such as water, sound, and x-rays

## Word Statistics

Library | 0 uses in 10 avg bks |

## trivial

We're in agreement on the main issues. We just have some

__trivial__details to work out.trivial = unimportant

## Definition

Generally*trivial*means:

of little importance; or describing a challenge as uninteresting and easy to solve

## Word Statistics

Library | 5 uses in 10 avg bks |

## reciprocal

## as in:

**reciprocal numbers**

the

__reciprocal__ratio of a:b is b:areciprocal = inversely related — especially one of a pair of numbers whose product is 1; e.g., 1/5 is the reciprocal of 5

## Word Statistics

Library | 0 uses in 10 avg bks |

## logarithmic scale

Earthquake force is measured with a

__logarithmic scale__(the Richter scale).†logarithmic scale = A scale in which positions are proportional to the logarithms of underlying values.

(editor's note: A normal (linear) scale might show one unit per inch; whereas a logarithmic scale (of base 10) might show 10 units at the first inch, 100 at the second, 1000 units for the 3rd, ...)

(editor's note: A normal (linear) scale might show one unit per inch; whereas a logarithmic scale (of base 10) might show 10 units at the first inch, 100 at the second, 1000 units for the 3rd, ...)

## Word Statistics

Library | 0 uses in 10 avg bks |

## plasma

## as in:

**a plasma gas**

In a

__plasma__, electrons and positive ions are attracted to each other, but are too energetic to stay together.plasma = an ionized gas (typically at high temperature) that is a good conductor of electricity and reacts to magnetic fields

## Word Statistics

Library | 1 uses in 10 avg bks |

## semiconductor

__Semiconductor__materials are at the foundation of modern electronics.†

semiconductor = a material that conducts electrical current under certain circumstances

## Word Statistics

Library | 0 uses in 10 avg bks |

## transistor

Today, most

__transistors__are embedded in integrated circuits.†transistors = a semiconductor device use to amplify (or control) electrical current

## Word Statistics

Library | 2 uses in 10 avg bks |

## integrated circuit

Better

__integrated circuits__will result in better phones.†integrated circuits = a microelectronic computer circuit incorporated into a single chip or semiconductor

## Word Statistics

Library | 0 uses in 10 avg bks |

## hydrostatics

analyze the

__hydrostatics__, hydrodynamics, and stability of the hull†hydrostatics = the study of the mechanical properties of fluids that are not in motion

## Word Statistics

Library | 0 uses in 10 avg bks |

## polarized light

__Polarized sunglasses__reduce glare caused by reflected light.†

polarized sunglasses = Light that vibrates in a single plane (as contrasted to ordinary light that vibrates in all directions)

## Word Statistics

Library | 0 uses in 10 avg bks |

## alkaline

an

__alkaline__battery†alkaline = having a pH greater than 7 (this is the opposite of acidic)

## Word Statistics

Library | 1 uses in 10 avg bks |

## decentralize

The government is

__decentralizing__economic decision making.†decentralizing = to change from one area of control or concentration to multiple areas

## Word Statistics

Library | 0 uses in 10 avg bks |

## diode

Today, there are many specialized

__diodes__, such as LEDs.†diodes = an electronic component that acts like a one-way valve

## Word Statistics

Library | 0 uses in 10 avg bks |

## ductile

It is less

__ductile__in the cold.†ductile = metal that is easily bent

## Word Statistics

Library | 0 uses in 10 avg bks |

## anion

__Anions__are larger than their parent molecule or atom.†

anions = a negatively charged ion

## Word Statistics

Library | 0 uses in 10 avg bks |

## cation

A hydrogen

__cation__contains no electrons, and thus is much smaller than the parent hydrogen atom.†cation = a positively charged ion

## Word Statistics

Library | 0 uses in 10 avg bks |

## derive

She likes to win, but she doesn't

__derive__pleasure from watching others lose.derive = get

## Definition

Generally*derive*means:

to get something from something else

(If the context doesn't otherwise indicate where something came from, it is generally from reasoning—especially deductive reasoning.)

(If the context doesn't otherwise indicate where something came from, it is generally from reasoning—especially deductive reasoning.)

## Word Statistics

Library | 6 uses in 10 avg bks |

SAT^{®} | top 1000 |

## derivative

a highly

__derivative__prose stylederivative = something developed from something else

## Definition

Generally*derivative*means:

something developed from something else such as:

- a word based on another word
- a mathematical value from a function
- the value of a financial instrument
- a work of art such as a film or painting that lacks ideas not previously expressed in other works of art

## Word Statistics

Library | 1 uses in 10 avg bks |

SAT^{®} | top 1000 |

## histogram

Most people will learn more from looking at a

__histogram__than from seeing the underlying standard deviation.†histogram = a bar chart representing a frequency distribution; heights of the bars represent observed frequencies

## Word Statistics

Library | 0 uses in 10 avg bks |

## machine tool

The factory closed and the

__machine tools__were shipped to Mexico.†machine tools = a powered mechanical device, typically used to fabricate metal components of machines by the selective removal of metal such as cutting, grinding or drilling

## Word Statistics

Library | 0 uses in 10 avg bks |

## joule

A

__joule__is the amount of energy required to lift a small apple one meter straight up.†joule = a small unit of electrical energy

## Word Statistics

Library | 0 uses in 10 avg bks |

## colloid

__Colloid__science has become important to nanotechnology.†

colloid = a mixture with properties between those of a solution and fine suspension

## Word Statistics

Library | 0 uses in 10 avg bks |

## potential energy

The pendulum repeatedly converts

__potential energy__to kinetic energy and then back.†potential energy = the energy stored in an object due to its position;

For example: an apple in a tree has potential energy that will be released if it is dropped to the ground; or a stretched rubber band has potential energy realized if it is released.

For example: an apple in a tree has potential energy that will be released if it is dropped to the ground; or a stretched rubber band has potential energy realized if it is released.

## Word Statistics

Library | 0 uses in 10 avg bks |

## abrasion

## as in:

**abrasion of the rubber**

We're convinced the skid marks are from her car because the rubber

__abraded__from her tires is consistent with the length of the skid marks that lead to the crash.abraded = wear away by rubbing

## Word Statistics

Library | 0 uses in 10 avg bks |

## conservation of energy

The First Law of Thermodynamics applies

__conservation of energy__to thermodynamic systems.†conservation of energy = physics: the fundamental principle that the total energy of an isolated system is constant despite internal changes

## Word Statistics

Library | 0 uses in 10 avg bks |

## right angle

The lines intersect at

__right angles__.†right angles = an angle measuring 90 degrees

## Word Statistics

Library | 2 uses in 10 avg bks |

## surface tension

__Surface tension__permits the water strider to walk on the surface of water.†

surface tension = physics: some insects can walk on water because of this water/air boundary created by the attractive forces between water molecules

## Word Statistics

Library | 0 uses in 10 avg bks |