How do invasive species contribute to the destabilization of ecosystems?

By outcompeting native species for resources

By increasing the number of predators

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

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

It increases genetic diversity among native plants.

It may lead to hybridization with native species.

Why are gray wolves so important to the Yellowstone's ecosystem?

As a top predator in the park, they leave leftovers from their meals for other organisms in the food chain.

They eat very few prey which allow the prey to survive easily.

They don't have much to eat so they don't survive well which means they don't affect the ecosystem at all.

Gray wolves are not important to the Yellowstone ecosystem.

What is meant by the biodiversity of an ecosystem?

The variety of the organisms, found in an ecosystem.

It is the life of animals documented in a journal.

It is all of the living animals within the ecosystem.

Its when an ecosystem is filled with almost identical types of organisms living together.

Why are lake trout more harmful to Yellowstone than the Cutthroat Trout?

Cutthroat trout mostly eat insects and are an important prey while lake trout have large appetites and eat many cutthroat trout.

Lake trout mostly eat insects and are an important prey while cutthroat trout have large appetites and eat many lake trout.

Because the lake trout are native species to Yellowstone while the cutthroat are invasive.

Cutthroat trout are more harmful than the lake trout.

Why is the osprey population decreasing in Yellowstone?

Osprey compete with lake trout for prey so as the population of cutthroat trout declines, it becomes harder for osprey to survive.

Osprey compete with sea lamprey for prey so as the population of cutthroat trout declines, it becomes harder for osprey to survive.

Osprey compete with cutthroat trout for prey so as the population of lake trout declines, it becomes harder for osprey to survive.

Osprey compete with cutthroat trout for prey so as the population of sea lamprey declines, it becomes harder for osprey to survive.

Why does the purple loosestrife fit well into the European ecosystem?

In Europe, there are natural predators that keep the purple loosestrife population in check.

In Europe there are no natural predators, so the purple loosestrife population flourishes.

In Europe, there are many prey for the purple loosestrife to eat.

The plant is pretty in gardens.

In what ways can we in North America combat the problem we have with loosestrife?

Raising beetles that only eat purple loosestrife.

Place chemicals on individual plants to kill them.

Burn the purple loosestrife plants.

Why do worms lay on the sidewalk following a large rain?

There is too much water underground and they need to move away from the large amount of rain.

They are able to suck up more water laying on the sidewalk than under the soil

They are too wet from the rain and need the sun to dry them up a bit.

They enjoy being above ground more than being below ground.

Organisms that live in an ecosystem are affected by...

both abiotic and biotic factors in the environment

only biotic factors in the environment

only abiotic factors in the environment

neither abiotic or biotic factors

What makes DDT so harmful to the environment? MARK ALL THAT APPLY

it stays in the environment and is a pollutant

it can get into the lakes and affect the aquatic life

it can be spread from animal to animal when they eat each other

it kills insects that were harming the production of crops.

it gets in human's eyes and makes it challenging to drive.

How did DDT affect the population of bald eagles?

It made the shells of the eggs weak so when the eagle would sit on the egg, it would break and kill the baby birds.

As the eagles inhaled the DDT in the air, it killed them quickly making them unable to reproduce.

It altered the DNA of the eagle's brain and they would not be able to effectively eat.

It killed the grass, which the eagles ate, meaning less food for the eagle.

The field mouse population in Australia has grown so fast that they eat an average of $4 billion of wheat every year. Their fast growth is caused by:

B. A lack of a native species to eat the field mouse

What happened to the level of dioxin between 1930 and 1965?

The level of dioxin remained constant

In what ways does phosphorous NOT enter the lakes.

plastic bags floating in the rivers

homes with leaky sewage systems

waste from pets and farm animals

Lake Superior does not have the same algae problem as Lake Erie, because...

Lake Erie is warmer than Lake Superior, allowing algae to grow easily.

Lake Erie is too cold for algae to grow easily.

Algae cannot survive in freshwater lakes like Lake Erie.

Lake Erie has a higher nutrient content, promoting algae growth.

If the dioxin level in a particular lake was found to be valued at 50 ppt, what effect might you expect it to have on the organisms in that ecosystem?

Acceptable (living things will survive)

Some damage will occur to living things

Why is biodiversity important in an ecosystem?

It provides stability and resilience against environmental changes.

It ensures that all organisms have the same resources.

It increases the dependency of one species on another.

It limits the flow of energy within the ecosystem.

In ecological communities, competition occurs when:

Two species fight for the same limited resources.

Two species benefit from each other.

Species live together without any interaction.

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

Authored by Mr. Liggett

Biology

6th - 8th Grade

65 Questions

NGSS covered

Used 28+ times

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

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do organisms compete for in an ecosystem?

food

water

space

all of the above

Tags

NGSS.MS-LS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

NGSS.MS-LS2-3

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

When is an ecosystem stable?

What indicates a high level of biodiversity in an ecosystem?

How does pollution affect an ecosystem's stability?

What role do decomposers play in an ecosystem?

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

What do organisms compete for in an ecosystem?

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

How do invasive species contribute to the destabilization of ecosystems?

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

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

Access all questions and much more by creating a free account

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