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Climate Change Lesson: Ocean Acidification + Coral Reefs
Virtual Science Teac
Created on May 2, 2022
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Transcript
Ocean Acidification
Climate Change
This interactive is brought to you by Virtual Science Teachers. Copyright Virtual Science Teachers 2022
Begin
Online Interactive + Worksheet
Ocean Acidification
This interactive is brought to you by Virtual Science Teachers. Copyright Virtual Science Teachers 2022
Begin
yes no
Are coral living animals?
The Great Barrier Reef is a huge underwater ecosystem that is made up of reef-building corals, tiny animals called polyps, that are held together by calcium carbonate.
Ocean Acidification
Click on the location of the Great Barrier Reef.
The Great Barrier Reef
yes no
Are coral living animals?
The Great Barrier Reef is a huge underwater ecosystem that is made up of reef-building corals, tiny animals called polyps, that are held together by calcium carbonate.
Welcome to the Great Barrier Reef!
The Great Barrier Reef is made up of over 3,000 reefs and is home to thousands of species of marine life. The coral reefs are known as the rainforests of the sea because of their incredible biodiversity.
Click on one of the fish that depend on the coral reef for food and shelter.
Continue
Your challenge is to learn how rising levels of CO2 are affecting the over 2300 km (1400 miles) of coral that make up the Great Barrier Reef.
Welcome to the Great Barrier Reef!
Carbon dioxide in the air, doesn't always stay in the air.
Copyright 2021 Virtual Science Teachers
Click on the carbon dioxide molecule.
Click on the carbon dioxide (CO2) molecule.
Copyright 2021 Virtual Science Teachers
Oceans absorb about 30% of the carbon dioxide (CO2) gas molecules released into the atmosphere.
Click on one of the hydrogen ions (H+).
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The carbon dioxide (CO2) reacts with water (H2O).... which eventually leads to an increase of hydrogen ions.
Click here to read an awesome ASU article on planton.
INCREASE IN CONCENTRATION OF H+ IONS
The pH of ocean water is about 8.1, which is slightly basic.
basic
neutral
acidic
The pH scale is a measure of the concentration of hydrogen ions. The more hydrogen ions, the lower the pH.
I decrease the pH of the water, making it less basic and more acidic.
- decreases
- increases
- does not change
- hydrogen ions (H+)
- sodium ions (Na+)
- lithium ions (Li+)
Click on one of the hydrogen ions (H+).
Not quit. Try again.
Check
Continue
Copyright 2021 Virtual Science Teachers
The pH of the ocean deacrease as it absorbs more carbon dioxide (CO2) gas from the atmosphere. Due to chemical reactions that begin with carbon dioxide (CO2) reacting with water (H2O), an increase in carbon dioxide in the ocean leads to a higher concentration of . This is referred to as ocean acidification.
Click here to read an awesome ASU article on planton.
INCREASE IN CONCENTRATION OF H+ IONS
The pH of ocean water is about 8.1, which is slightly basic.
basic
neutral
acidic
The pH scale is a measure of the concentration of hydrogen ions. The more hydrogen ions, the lower the pH.
I decrease the pH of the water, making it less basic and more acidic.
- decreases
- increases
- does not change
- hydrogen ions (H+)
- sodium ions (Na+)
- lithium ions (Li+)
Click on one of the hydrogen ions (H+).
Not quit. Try again.
Check
Continue
Due to chemical reactions that begin with carbon dioxide (CO2) reacting with water (H2O), an increase in carbon dioxide in the ocean leads to a higher concentration of . This means that the pH of the ocean deacrease as it absorbs more carbon dioxide (CO2) gas from the atmosphere. This is referred to as ocean acidification.
Click here to read an awesome ASU article on planton.
Copyright 2021 Virtual Science Teachers
According to this graph, the surface pH of the world's oceans ________ from about ______ in 1985 to less than ______ in 2020. Though it does not seem like a big change, this has negatively affected coral's ability to make the strong ________ they need to survive.
Click here to read an awesome ASU article on planton.
Click on the coral.
Copyright 2021 Virtual Science Teachers
The extra hydrogen ions (H+) decrease the pH of the of the sea water, stress the coral, and make it much harder for them to form their hard exoskeletons.
Click here to read an awesome ASU article on planton.
Continue
Mouse over the coral to see it after the the algae has left.
Algae live on, feed, and give coral its color. When the coral is stressed, the algae leave.
Click here to read an awesome ASU article on planton.
Click on the coral that are not healthy.
Copyright 2021 Virtual Science Teachers
The coral appear white without the algae. At this point, the coral are very vulnerable and more likely to die. This is coral bleaching.
Click here to read an awesome ASU article on planton.
Fish and other organisms that rely on the coral are less likely to survive.
Algae abandon stressed coral, leading to bleached coral that is less likely to survive.
Coral have a harder time growing their strong exoskeletons.
The coral are more likely to thrive.
The concentration of H+ ions increases and the pH of the sea water decreases.
Continue
Check
Not quite. Try again.
Select the effects of elevated levels of carbon dioxide (CO2) absorbed in the ocean.
Click here to read an awesome ASU article on planton.
Mouse over the graph to enlarge it.
- decreased
- increased
- coral bleaching
- coral spawning
- coral birthday
- 8.11
- 7.00
- 8.05
- 10.00
- 8.06
- 7.00
- 6.05
- 8.11
Not quit. Try again.
Continue
Check
Click on one of the hydrogen ions (H+).
Copyright 2021 Virtual Science Teachers
According to this graph, the surface pH of the world's oceans from about in 1985 to less than in 2020. Though this may not seem like a big change, this difference in pH has contributed to the several mass events at the Great Barrier Reef and other reefs around world.
Click here to read an awesome ASU article on planton.
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To summarize, the oceans a lot of CO2 from the atmosphere, causing the of the oceans. The pH of the oceans has been for several decades. This stresses the Great Barrier Reef and other coral ecosystems throughout the world and can lead to devastating mass coral events.
- decreasing
- increasing
- staying constant
- acidification
- basification
- calming
- absorb
- filter
- bleaching
- birthday
- graduation
Not quite. Try again.
Check
Copyright 2021 Virtual Science Teachers
This interactive is brought to you by Virtual Science Teachers. Copyright Virtual Science Teachers 2022