U5b Quizizz Photosynthesis and Light Absorption

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What does an absorption spectrum graph display?

• The rate of photosynthesis as a function of time

• The wavelength of light that photosynthetic pigments absorb

• The amount of oxygen produced by plants

• The growth rate of aquatic bacteria

On an absorption spectrum graph, what is represented on the y-axis?

• Time

• Rate of photosynthesis

• Wavelength of light

• Light absorption

Which parts of the light spectrum do most photosynthetic pigments absorb light in?

• Ultraviolet and infrared

• Green and yellow

• Blue-violet and red

• Orange and green

Why do leaves appear green to us?

• They reflect green light

• They absorb green light

• They absorb blue and red light only

• They do not absorb any light

What does the action spectrum graph show?

• The growth rate of filamentous algae

• The amount of light absorbed by chlorophyll

• The rate of photosynthesis against the wavelength of light

• The volume of gas produced by plants

How was the rate of photosynthesis historically measured?

• By the growth of plants

• By the increase in leaf size

• By the production of oxygen

• By the absorption of carbon dioxide

Who was the first person to compare the rate of photosynthesis with the wavelength of light?

• Gregor Mendel

• Theodore Engelmann

• Charles Darwin

• Albert Einstein

What did Theodore Engelmann use to split sunlight into its different colors?

• A prism

• A microscope

• A mirror

• A lens

Which colors of light did Engelmann's experiment show were important for photosynthesis?

• Green and yellow

• Blue and red

• Orange and green

• Ultraviolet and infrared