Ocean Acidification

 What is an acid?
Acids contain free hydrogen ions which easily bond with negative ions.
Alkalis contain free hydroxide ions which bond with positive ions
Ph levels tell us how strong the acid/base is. You can measure this using a ph meter or using the universal indicator with the colours.

• How have humans contributed to ocean acidification?

They have produced too much carbon dioxide where the oceans acidic levels are going up

How is ocean acidification affecting organisms in the ocean?

Less minerals that the organisms need like the corals in the great barrier reef

• Why is the rate of ocean acidification alarming to scientists?

Because if this keeps on going the the waters will be too toxic or acidic to swim and the organisms will start dying.

• What can you do to reduce the effects of ocean acidification?

The three R’s, REduce, Reuse, Recycle.

• Find a suitable line graph from a source NOT listed here, that shows ocean acidification over time. You MUST be able to understand it yourself! The graph should be simple enough for everyone in the class to understand.  Copy and paste it here.

• You can do this task in a group of 2 or 3 if you like. Everyone must have it written down though.
  How could we do an experiment in our classroom that investigates the effects of acidity on shellfish and coral? (Hint: both are made from calcium carbonate, what could we use to model/instead of their shells? Google!)

Design a small experiment that would give use more evidence for the dangers of ocean acidification on these animals. What would you need, what would you do, and what would any results tell you? (I will pick a few of the best explained experiments for us to actually do in class)  You can include images if you like.

Instead of their shells, we could use chalk, limestone, or marble.

We could use a sodastream to produce the carbonated sea water and then put the chalk or limestone in and exposing them to different levels of acidity and for a set amount of time and see the change.

http://www.cisanctuary.org/ocean-acidification/PDFs-WorkshopPage/Impacts%20of%20Carbonated%20Sea%20Water%20on%20Mussel%20and%20Oyster%20Shells_Oct_%202015.pdf

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My response:

My evidence:

97% of all scientist believe global warming.

My response:

My evidence:

Read this from an article about this.

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We put 3 eggs in three different types of liquids.

One contains vinegar, one has coke and one contains tap water.

We chose the vinegar and coke to act like the range of acidic levels.

We are using the eggs to act like coral or shellfish since the egg shells also contain calcium carbonated.

Coke - The shell is cracked and rotted on the inside. Colour darkened and the shell is now harder to break than the shell of a normal egg.

Vinegar - The shell became kind of like a snake’s egg but bouncy. Completely lost it’s colour and there’s nothing really left of the shell.

Water - No change to the shell.

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Stakeholder	Ways they could mitigate ocean acidification
Central government	Expanding marine restrictions and protection to stop overfishing.
Local government	Planting kelp forests, making sure only rain water go into the storm drains
Business	Stopping over fishing
Citizens/households	We could plant trees in your backyard