NEW
Font size
Worksheets8.11 Unit Test Review
Total questions: 25
Worksheet time: 50mins
An organism that cannot adapt to changes in the environment will most likely -
produce more offspring.
change its traits to survive.
die.
store more food.
Most water pollution is the result of -
human activities.
drought.
storms.
volcanic eruptions.
All of the following are examples of environmental changes that can be caused by humans EXCEPT -
clearing land for roads.
pesticides.
pollution.
volcanic eruption.
If there were a sudden increase in the GRASSHOPPER population, which of the following would be the most likely effect?
The insects in the habitat would increase.
The shrew population would decrease due to being the hawk's only food source.
The willow tree population would decrease.
Foxes would dies due to no food source.
In some environments, wolves prey on deer as their source of food. If all of the wolves were taken from the environment, what would most likely happen to the deer population?
The deer population would increase and begin to compete for food.
The deer population would become larger and healthier animals.
The deer population would decrease, because there would be an increase in disease.
The deer population would change color, because they would not have to hide from wolves.
The diagram below shows the relationship between some of the organisms in a marine food web. Which of the following is MOST LIKELY to happen if a large number of phytoplankton are killed from runoff entering the ocean?
The number of porpoises would probably stay the same because porpoises are far removed from phytoplankton in the food web
The number of zooplankton would probably increase because they wouldn’t have to compete with phytoplankton for food.
The number of salmon would probably decrease because there would be less food available for zooplankton and herring.
The Sun would probably not emit as much energy because there would not be as many phytoplankton in the ocean.
Artificial reefs placed on the seafloor enhance marine life by creating new reef habitats.
Positive Human Impact on Ocean Systems
Negative Human Impacts on Ocean Systems
Commercial fishing nets often times scrape the seafloor scooping up everything in its path. Dredge fishing destroys habitat and kills bycatch (fish, sharks, and other marine life caught unintentionally).
Positive Human Impact on Ocean Systems
Negative Human Impacts on Ocean Systems
Fertilizers from farms runoff into rivers and create dead zones at the mouth of rivers in our world's oceans.
Positive Human Impact on Ocean Systems
Negative Human Impacts on Ocean Systems
Fishing licenses regulate the number of fish and the size of fish that can be caught.
Positive Human Impact on Ocean Systems
Negative Human Impacts on Ocean Systems
The Great Pacific Garbage Patch is a collection of trash from our oceans currents from around the world.
Positive Human Impact on Ocean Systems
Negative Human Impacts on Ocean Systems
Recycling trash helps prevent plastic and other unwanted trash from entering our ocean systems.
Positive Human Impact on Ocean Systems
Negative Human Impacts on Ocean Systems
Warmer global temperatures have caused glaciers to melt resulting in higher ocean levels which displace humans and destroy wetlands.
Positive Human Impact on Ocean Systems
Negative Human Impacts on Ocean Systems
What is one way humans are trying to positively impact the ocean?
Fishing
Creating artificial reefs
Harvesting oil and natural gas
Transporting goods in ocean vessels
The largest source of pollution in the ocean comes from __________.
Oil Spills
Acid Rain
Runoff
Wind
The use of fertilizers on farmland can eventually cause an overgrowth of algae to appear in surrounding aquatic ecosystems. What process contributes to the increased growth of algae?
A decreased use of water by animals.
An increase in runoff after heavy rains.
An increase in the sedimentation of rivers.
A decrease in the erosion of creek beds.
This graph shows the sources of the nitrogen entering the Gulf of Mexico as pollution. What is one conclusion you can make based on the information in the graph?
Nitrogen that comes from the atmosphere is more harmful than nitrogen that comes from crops.
Most nitrogen pollution found in the Gulf of Mexico comes from farming crops.
Corn and soybeans are the only crops associated with nitrogen pollution.
Nitrogen is not a problem in the Gulf of Mexico.
The rapid growth of algae, called an algal bloom, can lead to the formation of dead zones that cannot sustain aquatic life. This is mainly because algal blooms lower the amount of -
chemical pollutants.
dissolved oxygen.
soluble salts.
freshwater runoff.
Which statement supports that algal blooms are dangerous for fish?
Algal blooms create dead zones.
Algal blooms deplete the dissolved oxygen needed by aquatic organisms.
Algal blooms floating of the water's surface can block the sun needed for other photosynthetic plants.
All of these
Which of these activities is most likely to increase the natural biodiversity in the area?
Building artificial reefs and limiting fishing activity.
Introducing non-native species to fill unoccupied habitats and banning fishing.
Building artificial reefs and increasing fishing activity.
Eliminating non-native species and encouraging fishing for large predatory fish.
The shrew population would decrease due to being the hawk's only food source.
In the 1850s, Thomas Austin released approximately twenty-four rabbits from Europe into the Australian countryside. By 1900, tens of millions of rabbits were found all over the Australian continent. The warm Australian climate and abundant farmland provided the perfect habitat for the rabbits. The rabbits caused extensive damage to all vegetation, and the lack of plants increased soil erosion. Why were the rabbits so successful?
Rabbits have a high death rate.
There are few effective predators.
Additional rabbit species have been introduced.
There is an increase in rabbit competitors.
Increase in available water and food
Increase in shelter
Increase in predators
Increase in light
This figure shows three warblers with different niches in a spruce tree habitat. The warblers are feeding in different areas of the tree which allows them to avoid -
competing with one another for food.
establishing a strict territory from one another.
creating a symbiotic relationship with one another.
caring for their young by supplying food.
