A circumference is the outer boundary, especially of a circular area; perimeter: the circumference of a circle.
100
What is an antonym?
An antonym is a word opposite in meaning to another. Fast is an antonym of slow.
100
What is a revolution?
A revolution is an overthrow or repudiation and the thorough replacement of an established government or political system by the people governed.
100
What is an adaptation?
An adaptation is a form or structure modified to fit a changed environment.
100
What is a biome?
A biome is a complex living community with distinctive plant and animal species.
200
What is volume?
Volume is the amount of space, measured in cubic units, that an object or substance occupies.
200
What is an antagonist?
An antagonist is a person who is opposed to, struggles against, or competes with another; opponent; adversary; villain.
200
What is democracy?
A democracy is a government by the people; a form of government in which the supreme power is vested in the people and exercised directly by them or by their elected agents under a free electoral system.
200
What is a decomposer?
A decomposer is an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances.
200
What is an onomatopoeia?
An onomatopoeia is the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
300
What is a proportion?
A proportion is a comparative relation between things or magnitudes as to size, quantity, number, etc.; ratio.
300
What is a citation?
A citation is the act of citing or quoting a reference to a source.
300
What is climate?
Climate is the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years.
300
What are genes?
A gene is the basic physical unit of heredity; a linear sequence of nucleotides along a segment of DNA that provides the coded instructions for synthesis of RNA, which, when translated into protein, leads to the expression of hereditary character.
300
What is irony?
Irony is a technique of indicating, as through character or plot development, an intention or attitude opposite to that which is actually stated.
400
What is perpendicular?
Perpendicular means meeting a given line or surface at right angles
400
What is fiction?
Fiction is the class of literature comprising works of imaginative narration, especially in prose form.
400
What is capitalism?
Capitalism is an economic system in which investment in and ownership of the means of production, distribution, and exchange of wealth is made and maintained privately.
400
What is ozone?
Ozone is a type of oxygen. In the upper atmosphere, it absorbs ultraviolet rays, preventing them from reaching the surface of the earth.
400
What is a hypothesis?
A hypothesis is an educated conjecture or a proposition, or set of propositions, set forth as an explanation for the occurrence of some specified group of phenomena.
500
What is a hypotenuse?
A hypotenuse is the side of a right triangle opposite the right angle.
500
What is works cited?
Works cited is a list of sources used in research or writing a paper.
500
What is a depression?
An economic depression is a state of economic trouble or depressed economic activity.
500
What is a solvent?
A solvent is a substance having the power of dissolving; causing solution.
500
What is an antibiotic?
An antibiotic is any of a large group of chemical substances, as penicillin or streptomycin, produced by various microorganisms and fungi, having the capacity in dilute solutions to inhibit the growth of or to destroy bacteria and other microorganisms, used chiefly in the treatment of infectious diseases.