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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 9 of 12 covers seven completed UTC days.

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Daily round

  1. Which chemistry term matches this definition: “the substance dissolved in a solvent”?

    Answer: Solute

    Solute is the term for the substance dissolved in a solvent.

  2. Which chemistry term matches this definition: “the component of a solution that dissolves another substance”?

    Answer: Solvent

    Solvent is the term for the component of a solution that dissolves another substance.

  3. 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.

  4. Which earth and space science term matches this definition: “the envelope of gases surrounding a planet”?

    Answer: Atmosphere

    Atmosphere is the term for the envelope of gases surrounding a planet.

  5. Which biology term matches this definition: “a biological catalyst that speeds a chemical reaction”?

    Answer: Enzyme

    Enzyme is the term for a biological catalyst that speeds a chemical reaction.

Daily round

  1. Which physics term matches this definition: “speed measured in a specified direction”?

    Answer: Velocity

    Velocity is the term for speed measured in a specified direction.

  2. Which earth and space science term matches this definition: “the change of water vapor into liquid water”?

    Answer: Condensation

    Condensation is the term for the change of water vapor into liquid water.

  3. Which physics term matches this definition: “the SI unit of power”?

    Answer: Watt

    Watt is the term for the SI unit of power.

  4. Which earth and space science term matches this definition: “molten or partly molten rock beneath Earth’s surface”?

    Answer: Magma

    Magma is the term for molten or partly molten rock beneath Earth’s surface.

  5. Which earth and space science term matches this definition: “a luminous ball of plasma powered mainly by nuclear fusion”?

    Answer: Star

    Star is the term for a luminous ball of plasma powered mainly by nuclear fusion.

Daily round

  1. Which chemistry term matches this definition: “a process in which a species gains electrons”?

    Answer: Reduction

    Reduction is the term for a process in which a species gains electrons.

  2. 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.

  3. Which earth and space science term matches this definition: “Earth’s thin outermost solid layer”?

    Answer: Crust

    Crust is the term for Earth’s thin outermost solid layer.

  4. Which physics term matches this definition: “force applied per unit area”?

    Answer: Pressure

    Pressure is the term for force applied per unit area.

  5. 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.

Daily round

  1. Which physics term matches this definition: “the maximum displacement of a wave from its equilibrium position”?

    Answer: Amplitude

    Amplitude is the term for the maximum displacement of a wave from its equilibrium position.

  2. Which chemistry term matches this definition: “a positively charged ion”?

    Answer: Cation

    Cation is the term for a positively charged ion.

  3. Which chemistry term matches this definition: “a reaction that releases energy to its surroundings”?

    Answer: Exothermic reaction

    Exothermic reaction is the term for a reaction that releases energy to its surroundings.

  4. Which biology term matches this definition: “an organism that makes organic food from inorganic materials and an energy source”?

    Answer: Producer

    Producer is the term for an organism that makes organic food from inorganic materials and an energy source.

  5. Which biology term matches this definition: “the process by which plants and some other organisms convert light energy into chemical energy”?

    Answer: Photosynthesis

    Photosynthesis is the term for the process by which plants and some other organisms convert light energy into chemical energy.

Daily round

  1. Which physics term matches this definition: “the number of repeating cycles per unit of time”?

    Answer: Frequency

    Frequency is the term for the number of repeating cycles per unit of time.

  2. 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.

  3. Which chemistry term matches this definition: “a process in which a species loses electrons”?

    Answer: Oxidation

    Oxidation is the term for a process in which a species loses electrons.

  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 physics term matches this definition: “the spreading of waves around obstacles or through openings”?

    Answer: Diffraction

    Diffraction is the term for the spreading of waves around obstacles or through openings.

Daily round

  1. Which physics term matches this definition: “a force that opposes relative motion between contacting surfaces”?

    Answer: Friction

    Friction is the term for a force that opposes relative motion between contacting surfaces.

  2. Which chemistry term matches this definition: “the logarithmic scale commonly used to express how acidic or basic a solution is”?

    Answer: pH

    pH is the term for the logarithmic scale commonly used to express how acidic or basic a solution is.

  3. Which physics term matches this definition: “electric potential difference between two points”?

    Answer: Voltage

    Voltage is the term for electric potential difference between two points.

  4. Which biology term matches this definition: “differential survival and reproduction associated with inherited traits”?

    Answer: Natural selection

    Natural selection is the term for differential survival and reproduction associated with inherited traits.

  5. Which physics term matches this definition: “the return of a wave from a boundary into its original medium”?

    Answer: Reflection

    Reflection is the term for the return of a wave from a boundary into its original medium.

Daily round

  1. Which biology term matches this definition: “the variety of genes, species, and ecosystems in a region or on Earth”?

    Answer: Biodiversity

    Biodiversity is the term for the variety of genes, species, and ecosystems in a region or on Earth.

  2. Which physics term matches this definition: “the SI unit of force”?

    Answer: Newton

    Newton is the term for the SI unit of force.

  3. Which physics term matches this definition: “a material that strongly resists the movement of electric charge”?

    Answer: Insulator

    Insulator is the term for a material that strongly resists the movement of electric charge.

  4. Which physics term matches this definition: “the distance between corresponding points on successive waves”?

    Answer: Wavelength

    Wavelength is the term for the distance between corresponding points on successive waves.

  5. Which chemistry term matches this definition: “a process in which a species gains electrons”?

    Answer: Reduction

    Reduction is the term for a process in which a species gains electrons.