raub S2
School 21/22
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Background: Since the focustrial Revolution began in 1760, the amount of carbon dioxide (C0.) in the atmosphere has increased
the to burning fossil fuels. At the same time, surface ocean water pt decreased by Qt pt units, which is a 30% increase in acidity
The ocean absorbs about 30% of the Co, that is released into the atmosphere and as levels of atmospheric Cine so do the
levels in the oceans. When carbon dioxide is absorbed by serwtec a series of chemical reactions take place that result in a higher
concentration of hydrogen fons, causing the seawater to become more acidic
Changes in ocean chemistry affect the life of calcitying critters such as clams, snails, oysters, and sea urchins. Due to the acid
increase these critters have a harder time creating durable shells. Since their shells are weakened, it is easier for predators to eat
them. This affects the entire oceann ecosystem, all organisms in the ocean, and many organisms outside the ocean like humans
When these organisms are at risk, the entire food web is at risk
Below are photos showing a shell made by a type of snail called a
peropod. These creatures are about the site of a small pea. Peropod
snails are eaten by tiny krill and huge whales. The photos show that a
Oday
45
pteropod's shell dissolves over 45 days when placed in seawater with the pH level projected for the year 2100
1.1 What is the purpose of the lab?
(read the materials & procedure)
What question are you exploring in
your lab?
feed the materials & procedure)
1. When did the concentration of
8.2 carbon dioxide start to increase?
2. What happens to the ocean water
when CO, is added?
3. How does the increased CO, levels
in the water affect the critters?
Vocabulary Words to use:
Acidification Carbonic Acid
Industrial
Fossil Fuel
1.2
មិ
u
Dotion