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Middle School: 6th, 7th and 8th Grade
Biology
Diffusion
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Q.1
Which of these molecules only moves by simple diffusion?
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Water
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Glucose
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Cholesterol
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Carbon dioxide
Q.2
Diffusion is...
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active
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inactive
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passive
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impassive
Q.3
The rate of diffusion is increased in which of the following situations?
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If there are fewer molecules
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If the surface area is increased
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If the temperature is decreased
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If the diffusion distance is greater
Q.4
Active transport is where molecules use a carrier and are moved...
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with the concentration gradient
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along the concentration gradient
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against the concentration gradient
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equally to the concentration gradient
Q.5
Diffusion happens faster in which of the following situations?
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If the difference in concentration is bigger
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If the difference in concentration is smaller
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If the difference in concentration is the same
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The difference in concentration makes no difference to the rate of diffusion
Q.6
Diffusion is the movement of particles from high concentration to which of the following?
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Higher concentration
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Lower concentration
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Equal concentration
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High concentration
Q.7
Diffusion requires which of the following?
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Energy
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No energy
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Glucose
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Insulin
Q.8
Which of these molecules is too big to diffuse through a membrane, using simple diffusion?
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Starch
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Oxygen
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Carbon dioxide
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Water
Q.9
Which of these is a major site for gaseous exchange in the body?
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Kidney tubule
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Alveolus
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Heart
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Aorta
Q.10
Diffusion is fast in the lungs. Why is this?
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Because the lungs have a huge area
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Because the lungs have a huge surface area
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Because the lungs have a huge volume
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Because the lungs have a huge density
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