Estuaries and Intertidal Zone

What is an estuary?

• A large body of fresh water surrounded by land

• A deep underwater trench in the ocean

• A type of fish found in the open sea

• A partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea.

What causes tides?

• Gravitational pull of the moon and the sun

• Changes in atmospheric pressure

• Gravitational pull of the Earth's core

• Rotation of the Earth

How often do tides occur?

• Only during full moons

• Twice a day

• Three times a day

• Once a week

What are the two main types of tides?

• high tides and low tides

• ebb tides and flow tides

• spring tides and neap tides

• ocean tides and sea tides

What is the difference between high tide and low tide?

• High tide is when the moon is full, while low tide is when the moon is new.

• High tide is when the sea is calm, while low tide is when the sea is rough.

• High tide is when the sea level is at its highest, while low tide is when the sea level is at its lowest.

• High tide is when the sea level is at its lowest, while low tide is when the sea level is at its highest.

How do tides affect the intertidal zone?

• Tides cause the water level to rise and fall, exposing different areas of the intertidal zone to air and water at different times.

• Tides have no effect on the intertidal zone.

• Tides only affect the intertidal zone during the day.

• Tides cause the water level to remain constant in the intertidal zone.

What types of organisms can be found in estuaries?

• Fish, crabs, oysters, clams, birds, and various types of plants

• Ants, spiders, and bees

• Lions, elephants, and giraffes

• Dolphins, sea turtles, and seaweed

Why are estuaries important ecosystems?

• Estuaries are important ecosystems because they serve as nurseries for many species of fish and other marine life, act as filters to improve water quality, and provide habitats for migratory birds and other wildlife.

• Estuaries are not important ecosystems because they do not support any marine life.

• Estuaries are not important ecosystems because they do not provide habitats for any wildlife.

• Estuaries are not important ecosystems because they do not have any impact on water quality.

What are some human activities that can negatively impact estuaries?

• Mining, recreational activities, climate change, and industrial waste

• Pollution, habitat destruction, overfishing, and dredging

• Climate change, tourism, agriculture, and urban development

• Oil spills, deforestation, invasive species, and boating

How can we protect and conserve estuaries?

• Increase pollution, encourage coastal development, promote unsustainable fishing practices, and remove protected areas.

• Implement measures to increase pollution, encourage coastal development, promote unsustainable fishing practices, and remove protected areas.

• Implement measures to reduce pollution, manage coastal development, promote sustainable fishing practices, and create protected areas.

• Ignore pollution, allow unrestricted coastal development, promote overfishing, and eliminate protected areas.