Latin/Greek Number Prefixes
What prefix means "one" and appears in the words "unicorn" and "monologue"?
uni- / mono- (one)
Which metric prefix means "thousand" and appears in the unit "kilometer"?
kilo- means thousand (kilometer)
Which prefix means "not" or "opposite of" and is found in "disapprove" and "disconnect"?
dis-
tri- meaning three (trio = group of three)
Which two prefixes mean "two" and one example is "bicycle"?
bi- / di- (two)
What prefix means "million" in the metric system?
mega- means million
Which prefix means "against" and is in words like "antibiotic" and "antitrust"?
anti-
The word "decathlon" uses a prefix meaning what number? Also name one event type included in a decathlon (general category).
dec- meaning ten (decathlon has ten track and field events)
Which prefix meaning "three" is used in "triangle" and "trilogy"?
tri- (three)
Which metric prefix means "one thousandth" and is used with grams to make a common lab unit?
milli- means one thousandth (milligram)
Which prefix means "away" or "opposite from" and is used in "decrease" and "depart"?
de-
Combine a metric prefix and a base unit to name the unit that equals one thousandth of a meter.
millimeter — milli- + meter = one thousandth of a meter
Which prefix meaning "four" appears in "tetra-" and "quad-"? Give one example word for each form.
quad- (Latin), tetra- (Greek). Examples: quadrant (quad-), tetragram (tetra-)
Match each base unit to its measurement type: meters, grams, liters, seconds, watts. (Give the measurement type for each unit.)
meters = linear measurement; grams = weight; liters = volume; seconds = time; watts = power
Name two prefixes from the list that can both mean "against" or "opposite" and give one example word for each (choose from counter-, contra-, anti-, dis-).
Examples: counter- (counteract), contra- (contrast) — both imply opposition; anti- (antibiotic) also means against; dis- (disallow) means not/opposite
Which prefix would you use to name a shape with seven sides based on the lists? Provide the prefix and the shape name.
sept- or hept- (seven). Shape: heptagon (Greek: hept-), septuplet uses sept-
Which prefix meaning "five" is used in "pentagon" and what is the alternate Latin form shown in the list?
quint- / penta- (five); example: quintet (Latin form), pentagon (Greek form)
Which metric prefix means "one millionth" and what is an example unit using this prefix?
micro- means one millionth (micrometer, written µm)
Explain how the prefix "counter-" differs in usage from "contra-" when forming English words. Provide one example of each.
"counter-" often forms nouns and verbs meaning "in opposition to" or "acting against" (counterargument, counterattack). "Contra-" frequently forms words of Latin/Greek origin meaning "against" or "opposite" often used in formal terms (contradict, contravene). Examples: counterattack vs. contradict.
Create a new sensible word by combining a negative/opposite prefix with a number-prefix root from the lists (for example, "dis-" + "count" is not valid here). Show your formed word, define it in plain 7th-grade language, and explain which prefixes you used and why this construction makes sense.
Example valid creation: "antiquad" (not a standard English word; for classroom creative exercise) — define: "antiquad" could mean 'against groups of four' (uses anti- meaning against + quad- meaning four). Explain: anti- (against) + quad- (four). Note: Creative coinages are for practice forming words from prefixes; they may not be standard English.