From The Ocean or Not?

From The Ocean or Not?

Grab a sheet of paper and put a line down the middle. On one side write From Ocean and on the other write Not.

Natural Sponge

Can of Tuna

Toothpaste

wood

Tubs of ice cream

Oil Can

Sponge

Water Bottle

Cat Food

Plastic Bag

Paper

Sardines

Pearls

Open Ended

Which of these items are from the ocean?

Items from the ocean include tuna fish, sardines, natural sponges, toothpaste (carrageenan from red algae is used to give toothpaste its consistency), ice cream (algae used to make it), cat food, pearls, and oil (drilling beneath the ocean floor).

Items dumped in the ocean include wood, synthetic (fake sponges), drinking water, plastic bottles, plastic bags, and paper.

Multiple Choice

One of the major ways humans depend on marine plants is for which of the following?

• Production of oxygen

• Regulation of ocean temperature

• Increasing atmospheric carbon dioxide

• Maintaining the concentration of salt

Multiple Choice

The oceans have a significant influence on Earth’s weather and climate in that -

• they are constantly changing levels of acidity.

• their wave action reshapes land features.

• they have the ability to store and release heat energy.

• they support enormous biodiversity.

Multiple Choice

In 1989, The Exxon Valdez, a tanker ship, ran aground and dumped 11 million gallons of oil into an area of Alaskan coastal water. How did this event affect ocean systems negatively?

• Increased growth of algae in and around the area.

• Modification of speed and direction of ocean currents.

• Addition of nutrients necessary for growth of aquatic plants.

• Death of large numbers of plants and animals.

Multiple Choice

Sometimes humans intentionally sink a ship to create an artificial coral reef. The creation of an artificial reef would have which of the following effects on the ocean ecosystem?

• Increases the amount of sunlight that reaches the ocean floor.

• Raises the average temperature of ocean water in the area.

• Provides a habitat for many interdependent organisms.

• Provides a habitat for many interdependent organisms.

This week we will be studying the human effects on ocean systems which makeup our largest ecosystems.