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Seven days of questions and answers

Science Trivia Answers Archive

Review earlier daily rounds, reveal the correct answer, and use the short explanation to learn the fact behind each question. Page 10 of 12 covers seven completed UTC days.

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Daily round

  1. Which earth and space science term matches this definition: “rock altered by heat, pressure, or reactive fluids without completely melting”?

    Answer: Metamorphic rock

    Metamorphic rock is the term for rock altered by heat, pressure, or reactive fluids without completely melting.

  2. Which earth and space science term matches this definition: “Earth’s central region, made mainly of iron and nickel”?

    Answer: Core

    Core is the term for Earth’s central region, made mainly of iron and nickel.

  3. Which biology term matches this definition: “a nucleic acid involved in gene expression and protein synthesis”?

    Answer: RNA

    RNA is the term for a nucleic acid involved in gene expression and protein synthesis.

  4. Which earth and space science term matches this definition: “the short-term state of the atmosphere at a particular place and time”?

    Answer: Weather

    Weather is the term for the short-term state of the atmosphere at a particular place and time.

  5. Which chemistry term matches this definition: “a substance that increases reaction rate without being consumed overall”?

    Answer: Catalyst

    Catalyst is the term for a substance that increases reaction rate without being consumed overall.

Daily round

  1. Which chemistry term matches this definition: “an element in group 18, whose atoms have filled outer electron shells”?

    Answer: Noble gas

    Noble gas is the term for an element in group 18, whose atoms have filled outer electron shells.

  2. Which chemistry term matches this definition: “a substance formed by a chemical reaction”?

    Answer: Product

    Product is the term for a substance formed by a chemical reaction.

  3. Which physics term matches this definition: “energy associated with motion”?

    Answer: Kinetic energy

    Kinetic energy is the term for energy associated with motion.

  4. Which biology term matches this definition: “the natural environment in which an organism lives”?

    Answer: Habitat

    Habitat is the term for the natural environment in which an organism lives.

  5. Which chemistry term matches this definition: “a reactive nonmetal element in group 17”?

    Answer: Halogen

    Halogen is the term for a reactive nonmetal element in group 17.

Daily round

  1. Which earth and space science term matches this definition: “rock formed when molten material cools and solidifies”?

    Answer: Igneous rock

    Igneous rock is the term for rock formed when molten material cools and solidifies.

  2. Which earth and space science term matches this definition: “the lowest atmospheric layer, where most weather occurs”?

    Answer: Troposphere

    Troposphere is the term for the lowest atmospheric layer, where most weather occurs.

  3. Which physics term matches this definition: “a material through which electric charge can move readily”?

    Answer: Conductor

    Conductor is the term for a material through which electric charge can move readily.

  4. Which chemistry term matches this definition: “a substance that accepts protons or increases hydroxide-ion concentration in water”?

    Answer: Base

    Base is the term for a substance that accepts protons or increases hydroxide-ion concentration in water.

  5. Which earth and space science term matches this definition: “an icy body that can form a glowing coma and tails near the Sun”?

    Answer: Comet

    Comet is the term for an icy body that can form a glowing coma and tails near the Sun.

Daily round

  1. Which chemistry term matches this definition: “a chemical bond formed when atoms share electron pairs”?

    Answer: Covalent bond

    Covalent bond is the term for a chemical bond formed when atoms share electron pairs.

  2. Which biology term matches this definition: “a body structure made of multiple tissue types working together”?

    Answer: Organ

    Organ is the term for a body structure made of multiple tissue types working together.

  3. Which chemistry term matches this definition: “a homogeneous mixture in which one or more substances are dissolved”?

    Answer: Solution

    Solution is the term for a homogeneous mixture in which one or more substances are dissolved.

  4. Which chemistry term matches this definition: “a reaction that absorbs energy from its surroundings”?

    Answer: Endothermic reaction

    Endothermic reaction is the term for a reaction that absorbs energy from its surroundings.

  5. Which chemistry term matches this definition: “the smallest unit of an element that retains that element’s chemical properties”?

    Answer: Atom

    Atom is the term for the smallest unit of an element that retains that element’s chemical properties.

Daily round

  1. Which chemistry term matches this definition: “a highly reactive metal element in group 1, excluding hydrogen”?

    Answer: Alkali metal

    Alkali metal is the term for a highly reactive metal element in group 1, excluding hydrogen.

  2. Which biology term matches this definition: “an organism’s role and resource use within an ecosystem”?

    Answer: Ecological niche

    Ecological niche is the term for an organism’s role and resource use within an ecosystem.

  3. Which physics term matches this definition: “the tendency of an object to resist a change in its motion”?

    Answer: Inertia

    Inertia is the term for the tendency of an object to resist a change in its motion.

  4. Which chemistry term matches this definition: “an atom or molecule with a net electric charge”?

    Answer: Ion

    Ion is the term for an atom or molecule with a net electric charge.

  5. Which chemistry term matches this definition: “a negatively charged ion”?

    Answer: Anion

    Anion is the term for a negatively charged ion.

Daily round

  1. Which biology term matches this definition: “the molecule that stores hereditary information in most organisms”?

    Answer: DNA

    DNA is the term for the molecule that stores hereditary information in most organisms.

  2. Which earth and space science term matches this definition: “the spinning of an object around its axis”?

    Answer: Rotation

    Rotation is the term for the spinning of an object around its axis.

  3. Which biology term matches this definition: “a preparation designed to train immune protection against a disease”?

    Answer: Vaccine

    Vaccine is the term for a preparation designed to train immune protection against a disease.

  4. Which chemistry term matches this definition: “the electrostatic attraction between oppositely charged ions”?

    Answer: Ionic bond

    Ionic bond is the term for the electrostatic attraction between oppositely charged ions.

  5. Which earth and space science term matches this definition: “the Sun and the objects gravitationally bound in orbit around it”?

    Answer: Solar system

    Solar system is the term for the Sun and the objects gravitationally bound in orbit around it.

Daily round

  1. Which physics term matches this definition: “the rate at which velocity changes over time”?

    Answer: Acceleration

    Acceleration is the term for the rate at which velocity changes over time.

  2. Which earth and space science term matches this definition: “the breakdown of rock at or near Earth’s surface”?

    Answer: Weathering

    Weathering is the term for the breakdown of rock at or near Earth’s surface.

  3. Which biology term matches this definition: “the organelle that produces much of a eukaryotic cell’s usable energy”?

    Answer: Mitochondrion

    Mitochondrion is the term for the organelle that produces much of a eukaryotic cell’s usable energy.

  4. Which physics term matches this definition: “the rate at which work is done or energy is transferred”?

    Answer: Power

    Power is the term for the rate at which work is done or energy is transferred.

  5. Which earth and space science term matches this definition: “the streak of light produced when a space particle heats in an atmosphere”?

    Answer: Meteor

    Meteor is the term for the streak of light produced when a space particle heats in an atmosphere.