Where Have All the Creatures Gone? IQWST LS1 (lessons 9-13)

When is an ecosystem stable?

• When the organisms in an ecosystem can mostly survive.

• When all the organisms in a particular ecosystem is able to survive.

• When food and water are plentiful.

• When an invasive species enters an ecosystem.

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

What indicates a high level of biodiversity in an ecosystem?

• Presence of multiple species of plants and animals.

• Domination by one species.

• Regular occurrence of natural disasters.

• Limited water resources.

Tags

NGSS.MS-LS2-5

How does pollution affect an ecosystem's stability?

• Increases species diversity.

• Has no significant effect.

• Leads to habitat destruction and loss of species.

• Enhances the food supply.

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NGSS.MS-LS2-1

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NGSS.MS-LS2-5

What role do decomposers play in an ecosystem?

• They pollinate plants.

• They break down dead material, recycling nutrients.

• They primarily consume living plants.

• They regulate water levels.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Using the graph above from the rabbits, foxes, and grass simulation in class, what claim can you make about the ecosystem?

• The ecosystem is stable

• The ecosystem is unstable

• This ecosystem could not exist

• None of the claims above are valid.

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What do organisms compete for in an ecosystem?

• food

• water

• space

• all of the above

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NGSS.MS-LS2-1

What is a direct consequence of pollution on aquatic food chains?

• Increased water clarity

• Enhanced plant growth

• Bioaccumulation of toxins in apex predators

• Decrease in water temperature

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NGSS.MS-LS2-2

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How do invasive species contribute to the destabilization of ecosystems?

• By promoting genetic diversity

• By outcompeting native species for resources

• By increasing the number of predators

• By reducing pollution

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NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-5

How does the introduction of a non-native plant species typically affect native plant species?

• It increases genetic diversity among native plants.

• It has no significant impact.

• It may lead to hybridization with native species.

• It can lead to competition for resources, sometimes causing native species to decline.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is called when two or more organisms are in need of the same resource?

• predation

• biodiversity

• natural selection

• competition