Ocean Sunlight- Read aloud with Questions

What is the process called when green plants use sunlight energy, water, and carbon dioxide to create sugar and release oxygen?

• Respiration

• Fermentation

• Photosynthesis

• Transpiration

What are the countless tiny plants that drift in the ocean, too small to see without a microscope, called?

• Seaweed

• Zooplankton

• Phytoplankton

• Kelp

What proportion of the oxygen we breathe every day comes from tiny phytoplankton floating in the seas?

• One-quarter

• Half

• Three-quarters

• All of it

Under ideal conditions with enough light and nutrients, how long does it take for one phytoplankton to grow and split into two identical twins?

• A few hours

• Approximately one day

• About a week

• Several months

Are you enjoying the video lesson?

• Yes

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What is the primary food source for zooplankton?

• Small fish

• Marine snow

• Phytoplankton

• Other zooplankton

Why are phytoplankton found only in the ocean's thin, top layer?

• The water is warmer in the top layer

• They require sunlight for survival

• There are fewer predators in the top layer

• Nutrients are more concentrated at the surface

What is marine snow composed of in the deep ocean?

• Tiny ice crystals

• Bioluminescent particles

• Falling flakes of dead organisms and waste

• Sand and sediment from the ocean floor

How are nutrients from the deep, dark waters brought back to the sunlit surface for phytoplankton?

• Through volcanic activity

• By large marine animals carrying them upwards

• By currents driven by sunlight

• They remain permanently at the bottom of the ocean