IB ESS Topic 3

Conservation approaches include which answer choices?

• habitat conservation

• species-based conservation

• mixed approach

• All the options are correct

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NGSS.MS-LS2-5

Which term describes a strategy of conservation where biodiversity is preserved in natural habitats?

• In situ conservation. Examples include protected areas and safari parks

• Ex situ conservation. Examples include zoos

True or False: The human activities that cause species extinctions include habitat destruction, introduction of invasive species, pollution, overharvesting and hunting

• True

• False

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NGSS.MS-LS2-5

NGSS.MS-ESS3-4

The main factors affecting biomes include which of the following?

• Precipitation

• Temperature

• Longitude

• Both Precipitation and Temperature are main factors

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NGSS.MS-ESS2-6

Phytoplankton is an aquatic organism that is an autotroph. In what part of a food chain will this organism belong in?

• Tertiary Consumer

• Decomposer

• Primary Producer

• Secondary Consumer

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NGSS.MS-LS2-3

Organisms that are harvested from aquatic systems for food are considered less energy efficient than crops. Why is this true?

• Crops capture directly from the sun, since they are primary producers

• Fish are from less trophic levels so they have a larger energy storage

• Crops are less energy efficient since they perform photosynthesis

• Aquatic organisms are more energy efficient since they perform respiration

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

What is the goal of having a maximum sustainable yield in fishing?

• To harvest as much fish as possible for profit, no matter the consequences

• To harvest a lower and insufficient amount of fish

• To harvest enough fish that the population isn’t harmed and continues to grow

• To harvest unsustainable amounts fish that the population is harmed

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NGSS.MS-LS2-1

NGSS.MS-ESS3-4

Advances in fishing techniques have caused the populations of many aquatic organisms to be over harvested. Which of the following is a consequence of over harvesting fish?

• Fish are not harmed by these newer fishing techniques

• The population of aquatic organisms is actually safer due to these new techniques

• Overharvesting of fish can lead to the endangerment of them

• Fish reproduce quickly, so overfishing is a minor issue

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

You are researching the water quality in a local river. You notice that there is a very high diversity of organisms. What can this tell you about water quality in this river?

• The water quality is good

• The water quality is poor

• The water is highly polluted

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NGSS.MS-LS2-4

BOD stands for biochemical oxygen demand. You are conducting research in a local river and you are measuring BOD. You measure that the river’s BOD is lower. What does that mean?

• Low BOD indicates that oxygen levels are higher

• Low BOD indicates that oxygen levels are low

• Low BOD indicates that the river has organic matter undergoing decomposition

• Low BOD indicates high levels of water contaminants

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NGSS.MS-LS2-3

NGSS.MS-LS2-1