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 11 of 12 covers seven completed UTC days.

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Daily round

  1. 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.

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

    Answer: Watt

    Watt is the term for the SI unit of power.

  3. 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.

  4. Which earth and space science term matches this definition: “a large rounded body orbiting a star that does not produce energy by stellar fusion”?

    Answer: Planet

    Planet is the term for a large rounded body orbiting a star that does not produce energy by stellar fusion.

  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 chemistry term matches this definition: “a starting substance that is changed during a chemical reaction”?

    Answer: Reactant

    Reactant is the term for a starting substance that is changed during a chemical reaction.

  2. Which earth and space science term matches this definition: “the distance light travels through a vacuum in one year”?

    Answer: Light-year

    Light-year is the term for the distance light travels through a vacuum in one year.

  3. Which biology term matches this definition: “the net movement of particles from higher concentration toward lower concentration”?

    Answer: Diffusion

    Diffusion is the term for the net movement of particles from higher concentration toward lower concentration.

  4. Which chemistry term matches this definition: “a physical combination of substances that are not chemically bonded”?

    Answer: Mixture

    Mixture is the term for a physical combination of substances that are not chemically bonded.

  5. Which chemistry term matches this definition: “the SI unit for amount of substance, containing a fixed number of entities”?

    Answer: Mole

    Mole is the term for the SI unit for amount of substance, containing a fixed number of entities.

Daily round

  1. 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.

  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: “an organism that breaks down dead material and recycles nutrients”?

    Answer: Decomposer

    Decomposer is the term for an organism that breaks down dead material and recycles nutrients.

  4. Which physics term matches this definition: “a measure of how strongly a material or component opposes electric current”?

    Answer: Resistance

    Resistance is the term for a measure of how strongly a material or component opposes electric current.

  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 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.

  2. Which chemistry term matches this definition: “a pure substance made of atoms with the same number of protons”?

    Answer: Element

    Element is the term for a pure substance made of atoms with the same number of protons.

  3. 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.

  4. 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.

  5. Which biology term matches this definition: “a network of linked feeding relationships in an ecosystem”?

    Answer: Food web

    Food web is the term for a network of linked feeding relationships in an ecosystem.

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 membrane-bound compartment containing most DNA in a eukaryotic cell”?

    Answer: Nucleus

    Nucleus is the term for the membrane-bound compartment containing most DNA in a eukaryotic cell.

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

    Answer: Velocity

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

  5. Which earth and space science term matches this definition: “the curved path of one object around another under gravity”?

    Answer: Orbit

    Orbit is the term for the curved path of one object around another under gravity.

Daily round

  1. Which chemistry term matches this definition: “an atom of an element with a particular number of neutrons”?

    Answer: Isotope

    Isotope is the term for an atom of an element with a particular number of neutrons.

  2. 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.

  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 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.

  5. Which earth and space science term matches this definition: “a vast gravitationally bound system of stars, gas, dust, and dark matter”?

    Answer: Galaxy

    Galaxy is the term for a vast gravitationally bound system of stars, gas, dust, and dark matter.

Daily round

  1. 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.

  2. 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.

  3. 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.

  4. 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.

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

    Answer: Newton

    Newton is the term for the SI unit of force.