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Science & Medicine — Set 2: Practice flashcards

6 of 15 questions free to study here · 8 topics · the whole deck is built into Willys

Fifteen sentence-completion questions on the Set 2 words, set in clinics, labs and observatories: four choices, one blank, and why the tempting wrong answer fails.

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Practice deck · part of Science & Medicine · written against: 150 words of health and science news; not medical advice. Updated 2026-10-10.

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  1. Astronauts lose bone in weightlessness, so mission doctors make sure the crew takes in enough calcium, a ______ the body cannot make and must get from food.

    A) toxin
    B) hormone
    C) protein
    D) nutrient
    D) nutrient

    Something taken in from food to stay healthy is a nutrient. Hormone is tempting as another substance the body uses, but the body makes its own hormones, and the stem says calcium must come from food.
    Body & Health
  2. Hawaii's native flowering plants are mostly ______: about nine in ten evolved on the islands and grow wild on no other land.

    A) endemic
    B) invasive
    C) dominant
    D) airborne
    A) endemic

    Living naturally in one place and nowhere else is endemic. Invasive is tempting because it describes plants and spread, but invasive species come from elsewhere, the opposite of plants that evolved on the islands.
    Disease & Infection
  3. Rather than let students pick their own partners for chemistry labs, the teacher had a spreadsheet ______ the pairs each week, so chance alone decided who worked with whom.

    A) randomize
    B) triage
    C) inoculate
    D) quarantine
    A) randomize

    Arranging by chance, so no one's preferences creep in, is to randomize. Triage is tempting because it also sorts people, but triage sorts by urgency, and here chance alone decides.
    Research & Technology
  4. A koala can't break down the tough fibers of eucalyptus leaves by itself; each helpful ______ in its gut, far too small to see, does part of the work.

    A) parasite
    B) microbe
    C) pollinator
    D) vector
    B) microbe

    A living thing invisible to the naked eye is a microbe. Parasite is tempting because it lives inside the koala, but a parasite feeds off its host and harms it, and these help.
    Genes & Life
  5. Though the job title sounds like it involves shooting stars, the airport's ______ spends each shift tracking storm fronts and warning pilots about ice.

    A) meteorite
    B) carrier
    C) meteorologist
    D) parasite
    C) meteorologist

    Someone trained in the science of weather, often the person who issues forecasts, is a meteorologist. Meteorite is tempting because of the shooting stars, but a meteorite is a space rock on the ground, and it can't track storms.
    Earth & Climate
  6. Unlike the rocky bodies in the belt beyond Mars, this ______ is a dusty ball of ice; as it nears the sun, the ice turns to gas and streams away in a glowing tail.

    A) comet
    B) asteroid
    C) meteorite
    D) exoplanet
    A) comet

    An icy body that grows a glowing tail near the sun is a comet. Asteroid is tempting as another small body orbiting the sun, but asteroids are the rocky bodies of the belt, and they usually grow no tail.
    Space

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More Science & Medicine decks

Set 1: MeaningsSet 1: Quick DrillsSet 1: In ContextSet 1: PracticeSet 2: MeaningsSet 2: Quick DrillsSet 2: In Context

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About these cards

Review status: Second-reader reviewed, with corrections applied.

Checked against:

  • Senses and parts of speech checked against Merriam-Webster.com, the American Heritage Dictionary and the Oxford Learner's, Longman and Cambridge learner's dictionaries; all definitions, notes and example sentences are original.
  • Word selection is our own, from general-reader news, textbooks and frequency data (wordfreq, CC BY-SA 4.0); no publisher's list is reproduced.
  • Facts in the question sentences checked against NASA, the USGS, the CDC, the NIH (Office of Dietary Supplements, NCCIH, MedlinePlus), the eCFR (21 CFR 314.126), the Hawaii Department of Land and Natural Resources, the University of Hawaii's College of Tropical Agriculture and Human Resources, the Cleveland Clinic, the Atomic Heritage Foundation, Physics Today and peer-reviewed papers; used for reference only, with no text copied.

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