Diffusion
2 hours ago
mrdarcy_75778
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  • Question 1
    60 seconds
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    Q.

    Diffusion is the natural movement of molecules from:

    answer choices

    Areas of low concentration to areas of high concentration

    Areas of high concentration to areas of low concentration

    Cold to hot environments

    Gaseous to liquid environments

  • Question 2
    60 seconds
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    Q.

    Which of the following describes molecules moving down a concentration gradient?

    answer choices

    Sugar settling at the bottom of a water glass

    A cell with lots of water in it absorbing even more water

    A bottle of soda in which bubbles of carbon dioxide are evenly distributed

    Warm air moving from a radiator to fill up a room

  • Question 3
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    Q.

    Which of the following describes a state of equilibrium?

    answer choices

    A group of molecules that have stopped moving completely

    A room whose temperature is consistent throughout

    Carbon dioxide bubbles escaping from a soda bottle when it's opened

    A tree's roots absorbing nutrients from the soil

  • Question 4
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    Q.

    When do molecules stop moving or vibrating?

    answer choices

    When equilibrium is reached

    Never

    When the temperature is below 0 degrees Celsius

    When the substance they are part of becomes a solid

  • Question 5
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    Q.

    What causes diffusion?

    answer choices

    The constant, random motion of molecules

    Magnetic attraction between atoms

    The nuclear forces that hold atoms together

    The tendency of atoms to form chemical bonds with one another

  • Question 6
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    Q.

    From fastest to slowest rate of diffusion, which of the following is in the correct sequence?

    answer choices

    Solids, liquids, gases

    Liquids, gases, solids

    Gases, liquids, solids

    Gases, solids, liquids

  • Question 7
    60 seconds
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    Q.

    Which of the following will diffuse the fastest?

    answer choices

    A tablespoon of sugar in a glass of water

    Heat through a solid piece of steel

    A pinch of salt in a glass of water

    The smell of bacon cooking throughout a room

  • Question 8
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    Q.

    Why is diffusion so important in biology?

    answer choices

    It's the basic power source for most types of cells

    It allows substances to move across cell membranes

    It prevents toxins from entering our bodies

    Without diffusion, cell division could not take place

  • Question 9
    60 seconds
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    Q.

    What happens to the coffee particles when coffee is added to hot water?

    answer choices

    They sink to the bottom of the cup

    They spread out

    They clump together

    They freeze

  • Question 10
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    Q.

    What does a 'region with high concentration' mean?

    answer choices

    An area with a SMALL number of particles

    An area with a LARGE number of particles

    An area with an UNEVEN number of particles

    An area with no particles

  • Question 11
    60 seconds
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    Q.

    Diffusion is the movement of particles from an area of _____ concentration to an area of ______ concentration

    answer choices

    High, Low

    Low, High

    Low, Low

    High, High

  • Question 12
    60 seconds
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    Q.

    What does “area of high concentration” mean?

    answer choices

    Spread out

    Tightly packed together

    Uncrowded

    Spacious

  • Question 13
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    Q.

    An increase in temperature does what to diffusion?

    answer choices

    Speeds it up

    Slows it down

    Nothing

    Stops it all together

  • Question 14
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    Q. What happens to particles when they are heated?
    answer choices
    They speed up and spread out
    They slow down and compress
    They stop moving
    They move closer together and speed up
  • Question 15
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    Q.

    Which gases move into and out of the blood at the lungs by diffusion

    answer choices

    Nitrogen and Oxygen

    Oxygen and Carbon Dioxide

    Nitrogen and Carbon Dioxide

    Argon and Nitrogen

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