SCIENCE 5 REVIEW ACTIVITY

What is an estuary?

• A deep ocean environment

• A place where freshwater and saltwater mix

• A freshwater lake

• A desert ecosystem

Which of these is NOT a producer found in estuaries?

• Seagrasses

• Phytoplankton

• Salmon

• Mangroves

What happens to energy as it moves through a food chain?

• It increases at each level

• It stays the same

• It decreases at each level

• It disappears completely

What type of water is found in estuaries?

• Pure saltwater

• Pure freshwater

• Brackish water

• Distilled water

Which factor does NOT affect the health of an estuary?

• Temperature

• Wind speed

• Dissolved oxygen

• Salinity

What are organisms called that break down dead matter in estuaries?

• Producers

• Decomposers

• Primary consumers

• Secondary consumers

Which organism is a secondary consumer in estuaries?

• Seagrass

• Mussel

• Crab

• Phytoplankton

What happens when water temperature in estuaries increases?

• Dissolved oxygen increases

• More fish survive

• Plants grow faster

• Dissolved oxygen decreases

What is a food web?

• A spider's home

• A single chain of energy transfer

• Interconnected food chains

• Only producer-consumer relationships

Which of these is a primary consumer in estuaries?

• Seal

• Shrimp

• Gull

• Lobster