Aquatic Ecosystems

Which of the following is NOT an abiotic factor?

• pH

• dissolved oxygen

• sunlight

• coral reef

What is the pH of pure water?

• 8.4

• 7.0

• 7.5

• 6.0

How is algae growth affected by excess nitrogen and phosphorus?

• algae growth increases

• algae growth decreases

• algae growth remains constant

• all algae may die off

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS1-5

What term describes the amount of salt dissolved in water?

• pH

• salinity

• circulation

• ocean acidification

What is the name of the type of plankton that can perform photosynthesis?

• Phytoplankton

• Zooplankton

• Bentoplankton

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

Sea urchins and sea anemones are examples of ...

• nekton

• benthos

• plankton

• corals

Aquatic organisms are affect by what factors?

• depth & sunlight

• temperature & salinity

• dissolved gasses & nutrients

• All of the choices

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-5

What are the two most important abiotic factors in determining the productivity, or amount of life in different areas of the ocean? Choose two.

• Amount of sunlight.

• Wind and wave speed

• Nutrient levels in the water

• Amount of dissolved carbon dioxide in the water

Tags

NGSS.MS-LS2-1

Which of the following 4 words or phrases does not fit with the other 3?

• Phytoplankton
• Primary producer
• Respiration
• Photic zone

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

Which organism is at the base of a marine food web?

• crab

• phytoplankton

• whale

• zooplankton

Tags

NGSS.MS-LS2-3