The deer population has significantly increased in an ecosystem, the best hypothesis is

the deer's main predator has been eliminated

decreased water levels of local ponds

organisms that rely on similar food sources migrated to the area

Which list contains only animals that receive energy transferred directly from consumers in this food web?

Red-tailed hawks, snowshoe hares, and caterpillars

Snowshoe hares and caterpillars

Which statement correctly describes the transfer of energy in a food chain in this wetland?

Energy is transferred from cattails to crickets to shrews to hawks.

Energy is transferred from hawks to shrews to grasshoppers to marsh grasses.

Energy is transferred from marsh grasses to crickets to hawks to frogs.

Energy is transferred from grasshoppers to crickets to frogs to hawks.

A large volcanic eruption can produce a cloud of ash that can impact the world's climate for some time. A cloud of ash that blocked out the sun for four months would MOST LIKELY have which of these effects?

lower temperatures and slower rates of plant growth due to block sunlight

higher temperature on Earth and increased rates of photosynthesis

large amounts of precipitation and flooding of costal areas

high rates of extinction among reptiles and amphibians

What is the main difference between primary and secondary ecological succession?

Primary begins WITHOUT soil; Secondary begins WITH soil

Primary is the first state and secondary is the second stage

Primary builds plant community; secondary builds animal community

Primary begins WITH soil; Secondary begins WITHOUT soil

What is the main difference between primary and secondary ecological succession?

Primary begins WITHOUT soil; Secondary begins WITH soil

Primary is the first state and secondary is the second stage

Primary builds plant community; secondary builds animal community

Primary begins WITH soil; Secondary begins WITHOUT soil

What is an example of an area that is likely to undergo primary succession?

Glaciers melt and leave exposed rock

Plants die from drought and decompose

Land is bulldozed and soil remains

What is an example of a disturbance that could bring about secondary succession?

Humans cut down many trees in a small region

A volcanic eruption covers a village in lava.

Which question is most likely relevant to an ecosystem beginning primary succession?

Why is there no soil, grass, or shrubs present in the ecosystem?

Why are there so many kinds of animals living in the ecosystem?

What types of hardwood trees are growing in the ecosystem?

What caused the forest fire that destroyed the previous ecosystem?

Which question is most likely relevant to an ecosystem beginning secondary succession?

What caused the forest fire that destroyed the previous ecosystem?

Why is there no soil, grass, or shrubs present in the ecosystem?

Why are there so many kinds of animals living in the ecosystem?

What types of hardwood trees are growing in the ecosystem?

What does biodiversity mean?

The different amount of species in an area

The trees these moths used to live on were white, but have been covered in soot from coal factories. Which moth will be more successful in this environment?

Both will be equally successful

Image "B" shows more biodiversity than image "A". Why?

Because "B" shows more different species than image "A"

Because image "B" has less different species than "A"

"A" has a greater number of same species plants so this statement is wrong.

Both images show the same biodiversity

Biodiversity is important to keep an area (biome) healthy. In this example "Food Web A" is sustainable. Why is sustainability important for an ecosystem in "Food Web A".

If one organism is removed the food web can still operate (work) with little or no negative effect.

If an organism is removed the food web will collapse and will affect the environment.

Food Web B is an example of...

Low biodiversity and low sustainability. If the producer dies then all the food web will suffer.

High biodiversity and high sustainability. If an organism is removed the food web will continue with no effect.

In this food web example you can see that rain forests have many producers consumer and predators. How would you describe the rain forest biome?

It has high "rich" biodiversity

It has low "poor" biodiversity.

Biodiversity is best described as...

the amount of different species of organisms (plants and animals) living in the same area.

when only a few species inhabit an area.

when only one organism (plants and animals) is found living in one area.

Students in a science class visited four local ecosystems. The students observed the species present in each ecosystem and recorded their observations in the table. Based on these observations, which ecosystem is likely to be the LEAST sustainable?

Ecosystem 1, because it has the fewest species.

Ecosystem 2, because it includes both aquatic and terrestrial species.

Ecosystem 3, because it has few predators.

Ecosystem 4, because it supports many animals.

The food webs below model relationships among the organisms in two ecosystems. Which ecosystem would be more likely to survive if a disease killed the grasses?

The forest ecosystem, because most of the animals can eat other organisms.

The grassland ecosystem, because several predators compete for food.

The forest ecosystem, because it has three top predators.

The grassland ecosystem, because it has many herbivores.

Unit 8: Organisms and Environment

Authored by Kira Vlk

Science

8th Grade

NGSS covered

Used 12+ times

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51 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What organism consumes both rabbits and birds?

The Hawk

The Wolf

The Plant

The Mushroom

Tags

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Who are the primary producers in this food web?

The lizard and the Hawk

The Grasshopper and the Mouse

The rabbit and the Hawk

The lizard and the snake

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What level consumer could you consider the deer?

Primary

Secondary

Tertiary

Quarternary

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A secondary consumer will gain energy from what level consumer?

Producers

Primary Consumers

Tertiary Consumers

Apex Predators

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The original source of energy for a food web is...

plants

sun

producers

decomposers

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Arrows in a food web represent...

eating

sunlight

energy

matter

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Who is the producer?

lettuce

greenfly

ladybird

thrush

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Unit 8: Organisms and Environment

What organism consumes both rabbits and birds?

Who are the primary producers in this food web?

What level consumer could you consider the deer?

A secondary consumer will gain energy from what level consumer?

The original source of energy for a food web is...

Arrows in a food web represent...

Who is the producer?

The deer population has significantly increased in an ecosystem, the best hypothesis is

Which relationship describes predator/prey

An organism that needs to eat other organisms to obtain energy is known as a:

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