Aquatic Zones

Fill in the Blank

________ are important to all life on earth.

Multiple Choice

The main producers are algae and _______ (plants in the ocean that makes oxygen)

• algal bloom

• fish

• phytoplankton

​Ocean Zones

Poll

If you could live in any part of the ocean where would you live?

• Up top near the sunlight so you could stick your neck out of the water

• In the middle just swimming

• In the deep depths of the dark sea where no one would be able to see you

Multiple Choice

This is the zone where no light or very little light penetrates.

• Photic

• Aphotic

Multiple Choice

Which zone is where a primarily of photosynthesis in the ocean occurs?

• Photic zone

• Aphotic Zone

Multiple Choice

In which oceanic zone do the land and ocean meet and clams and crabs survive by burrowing (make holes) in the sand?

• oceanic

• intertidal

• deep ocean

• open ocean

Fill in the Blank

The Abyssal Zone can also be called the _____ zone.

Multiple Choice

Which contributes most in supporting life on the deep ocean floor?

• cold water temperatures

• extreme water pressures

• hydrothermal vents

• lack of preators

Multiple Choice

Quick review: What percentage of earth's water is found in the oceans? What percentage is freshwater?

• 97% is ocean water

  3% is freshwater

• I don't remember

• 70% is ocean water

  3% is freshwater

• 50% is ocean

  50% is freshwater

Multiple Choice

Quick Review: Which is Earth's largest source of drinkable water?

• Lakes

• rivers

• oceans

• aquifers

Upwelling

​The bringing of nutrients and cold water from deep in the ocean floor to the surface.

• Increases aquatic life

• Increases fishing industry

• Increases productivity
  

Multiple Choice

An ocean current that brings cold, nutrient rich water to the surface is a

• salinity

• upwelling

• coastal current

• downwelling

Multiple Choice

Upwellings...

• increase productivity

• draw in aquatic life for feeding

• increase fishing

• all of the above

Estuaries

Where fresh and salt water meet

• https://youtu.be/qrYQFdukGMg?feature=shared

• Contain brackish water

Multiple Choice

True or False:

Estuaries are some of the most productive ecosystems in the world.

• True

• False

Multiple Choice

A mix of salt and fresh water

• salinity

• brackish

• pH

• turbidity

Multiple Choice

Why are estuaries so important for life?

• Filter out pollutants and prevent erosion

• Act as a home for many types of wildlife

• Provide nurseries for marine life

• All of the above