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Copy of 3.16 Unit 3 Test (1/10/2025) 25-26

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Last updated about 3 hours ago
15 questions
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HS-ESS2-2
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011 Unit 3 Lesson 4, Unit 3 Review: https://smart.newrow.com/#/share/cnJdZw8Y7L~~j-LILMABTqjgwF3cWoRs-L37S1izGs7vk-FY8ts65hSWnepBKGoC0hmnGbTq1nh-DiobfdddlM6NPCokOcdRK9ssbfitG2EXlkGbT16eiF-mdxuT0lNM7ofGyw2hH~JUw4yDknfGEXO5pfZDeigghe5Ljqchf6g7gb88Lt4whTmJjo2f4Rr-9D1SRjgY3enY85vX5tJQVA__
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Question 12
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Read the information and answer the questions.

A coral reef is made up of organisms called corals. Corals are marine animals whose skeletons form the structure of the reef. The bright colors of coral reefs are caused by algae that live inside the skeleteons of the corals and provide the corals with energy.

Coral reefs provide homes for about 25% of all marine species. The Coral Reef Ecosystem diagram shows some of the organisms found in a coral reef ecosystem.



When stressed, corals expel the algae, lose their bright colors, and become white. This is nown as a coral bleaching event. If the stress lasts for only a short time, the corals can recover. But if the stress lasts for a long time, the corals can starve.
Question 13
13.

An increase in the temperature of seawater is one possible cause of coral bleaching. The Global Coral Bleaching Events graph shows the relationship between the change in seawater temperature and three global coral bleaching events.


The change in seawater temperature is correlated with the amount of carbon dioxide in the atmosphere. The Atmospheric Carbon Dioxide graph shows how the amount of carbon dioxide in he atmosphere has changed since 1960.

Question 14
14.

Question 15
15.

Describe what could happen to a healthy coral reef ecosystem if atmospheric carbon dioxide levels continue to increase.

Be sure to include:
- Describe one way a healthy coral reef ecosystem could change if atmospheric carbon dioxide levels continue to increase.
- Describe how that change to a coral reef ecosystem could affect other organisms in the coral reef ecosystem.

According to the density profile shown here, at which depth would you find the coolest, saltiest waters?
Depth A
Depth B
Depth C
Ocean currents have an effect on which two things?
climate and weather
temperature and density
equator and poles
What do we call the constantly moving system of deep-ocean circulation driven by differences in temperature and salinity?

California Current
Surface Currents
Global Conveyor Belt
Gulf Stream
Salt water is _____________ fresh water.
more dense than
less dense than
the same density as
As the temperature of ocean water changes from 10 to 30 degrees C, how does the density change?
The water becomes more dense
The water becomes less dense
The density does not change
It is impossible to predict
What factors create deep ocean currents?
Increase in salinity; increase in temperature
Increase in salinity; decrease in temperature
Decrease in salinity, decrease in temperature
Decrease in salinity, increase in temperature

Which of the following drives global thermohaline (conveyor belt) circulation?
changes in density
changes in pH
changes in wind direction and velocity
changes in gravity
What is the upward movement of cold water from the ocean depths called?
La Nina
Upwelling
Global warming
El Nino
As more carbon has been put into the atmosphere, the ocean's pH levels have decreased. This is known as...
upwelling
El Nino
ocean acidification
Global Conveyer Belt
In class we learned about the possibility of slowing of deep water currents. What would be the main cause of the slowing?
The density of the ocean water being decreased near Greenland
El nino warming the surface waters of the Pacific Ocean
Desalination plants around the world
Upwelling from the depths of the ocean
What is the most likely cause of the coral bleaching shown below?

Abnormally high water temperatures
Increased storm intensity
Excess nutrients
Ocean acidification
Surface ocean temperatures of the eastern tropical Pacific are colder than average during an El NiƱo event.
True
False
A student claims that coral reef ecosystems are stable because they can recover after a bleaching event.

Which evidence should be collected to evaluate the student's claim?
the number of algae in a coral reef ecosystem during a bleaching event
the size of predators in a coral reef ecosystem that survive a bleaching event
the number and type of organisms in a coral reef ecosystem before and after a bleaching event
the temperature of the ocean in a coral reef ecosystem before and after a bleaching event
Scientists claim that an increase in carbon dioxide in the atmosphere destabilizes coral reef ecosystems. Which evidence from the Global Coral Bleaching Events and Atmospheric Carbon Dioxide graphs supports the claim?
The increase in the frequency of coral bleaching events correlates with the increase in atmospheric carbon dioxide levels
The atmospheric carbon dioxide level was highest before the first coral bleaching event occurred
The increase in seawater temperature correlates with the decrease in atmospheric carbon dioxide levels
The atmospheric carbon dioxide level and change in seawater temperature flucatuate at regular intervals