Which statement best describes ecological succession?

The observed changes in an ecological community over time

The passing of traits from parent to offspring

The change in the characteristics of a species over several generations and relies on the process of natural selection

In which environment would primary succession take place? Select 2 options.

an area of bare rock under a glacier

Which best defines a pioneer species?

the first species to populate an uninhabited area

a species that enters an area and makes its own food

a species that enters a community that is stable and balanced

the first species that eats other organisms in an area

After a volcanic eruption, lava flowed over an area and then cooled to form a thick layer of new rock. One thousand years later, a thriving forest with diverse flora and fauna is found in that area, even though evidence suggests that several large forest fires have occurred. Which statement best describes what happened?

Primary succession occurred, followed by several secondary successions.

Secondary succession occurred, followed by several primary successions.

Only secondary successions occurred.

Only primary successions occurred.

Moss grows where there was previously only rock. Which situation describes this example?

a pioneer species in primary succession

a pioneer species in secondary succession

a climax community in primary succession

a climax community in secondary succession

Which statement best contrasts pioneer species and climax communities?

Pioneer species are involved in the first stage of succession, and climax communities are involved in the final stage of succession.

Pioneer species are involved in the final stage of succession, and climax communities are involved in the first stage of succession.

A pioneer species will change into a different species in the climax community.

A climax community is made up of multiple pioneer species.

Which best compares habitat and niche?

Habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.

Niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.

Habitat is a group of organisms that live in an area, and niche is a specific species that lives in that area.

Niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

Fishermen have removed most of the adult bass from the wetlands community. Based on the information in the chart, which of these would MOST likely occur?

Minnows have more difficulty reproducing.

Snails need to find another food source.

Young bass migrate to other areas.

Royale is a large island in Lake Superior. During the 1800s, most of the trees were removed, and the wolves and moose that lived on the island died. In the early 1900s, moose were reintroduced to the island. By 1925, the moose population on Isle Royale rose to about 2,000 individuals. Which BEST explains how the moose population grew so rapidly?

There were no predators to control the population.

The death rate was greater than the birth rate.

There was unlimited food for the moose to eat.

The birth rate decreased and few moose died.

Which statements describe the relationship between the area and the biodiversity of an ecosystem? Check all that apply.

A large area of a forest will likely have higher biodiversity than a smaller area of the same forest.

A half acre of rainforest would likely have greater biodiversity than a full acre of desert.

Large ecosystems always have higher biodiversity than smaller ecosystems.

Small ecosystems always have low biodiversity.

The same area of two different types of ecosystems will have the same biodiversity.

Wolves, which are top predators, were eliminated from Yellowstone National Park in the 1930s. In 1995, wolves were reintroduced into Yellowstone. During the period in which wolves were absent from Yellowstone, which MOST likely occurred?

an increase in competition for food resources among small prey

a greater opportunity for primary producers to flourish

an increase in the population of tertiary consumers

a greater balance of predator-prey relationships

Which best explains why a decrease in the types of insects in an ecosystem reduces the sustainability of the ecosystem?

Organisms that depend on insects may not survive, eventually harming all the organisms that are interconnected.

The biodiversity of the ecosystem cannot be protected by laws unless there are a certain number of insect species.

There will likely be fewer insects that harm plants, causing an increase in plant diversity.

Having fewer insects allows other organisms to use the resources that the insects were using.

Which of the following BEST explains what will occur when a population grows larger than the carrying capacity of its environment?

The emigration rate will decrease.

The competition rate will decrease.

Which of the following statements about human society and limiting factors is true?

Modifications made to the environment to reduce the impact of limiting factors can cause disruption to the natural balance of an ecosystem.

Humans cannot modify their environment to adapt it to their needs.

Humans can completely overcome the factors that limit population size.

Limiting factors are of no concern to human society, because they do not affect human populations

Which of the following is not a reason that small societies can maintain stability in the long term better than larger societies?

Smaller societies rely more heavily on legislation and military forces.

Smaller societies have a smaller demand for resources.

Smaller societies can be governed by internal controls more effectively than larger societies.

In which environment would secondary succession take place? Select 2 options.

an area of bare rock under a glacier

If the population growth is zero then

the birth rate and immigration is greater than the death rate and emigration

Which statement best contrasts pioneer species and climax communities?

Pioneer species are involved in the first stage of succession, and climax communities are involved in the final stage of succession.

Pioneer species are involved in the final stage of succession, and climax communities are involved in the first stage of succession.

A pioneer species will change into a different species in the climax community.

A climax community is made up of multiple pioneer species.

Royale is a large island in Lake Superior. During the 1800s, most of the trees were removed, and the wolves and moose that lived on the island died. In the early 1900s, moose were reintroduced to the island. By 1925, the moose population on Isle Royale rose to about 2,000 individuals. Which BEST explains how the moose population grew so rapidly?

There were no predators to control the population.

The death rate was greater than the birth rate.

There was unlimited food for the moose to eat.

The birth rate decreased and few moose died.

Which are true statements about invasive species? Check all that apply.

Invasive species are species that have been introduced into areas outside their native range

Invasive species may outcompete native species for resources or habitat, altering community structure and potentially leading to extinctions

Invasive species are native to their environment.

Invasive species seldom cause caused harm in their new area.

This graph shows/illustrates/suggests that

as niche diversity increases biodiversity increases

as niche diversity increases biodiversity decreases

as niche diversity decreases biodiversity increases

as niche diversity decreases biodiversity decreases

This graph illustrates/shows/suggests

a positive correlation between niche diversity and biodiversity

a negative correlation between niche diversity and biodiversity

both a negative and a positive correlation between niche diversity and biodiversity

no correlation between niche diversity and biodiversity

Unit 4 Review: Ecosystems

Authored by Jennifer Adelman

Science

6th - 8th Grade

NGSS covered

Used 27+ times

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43 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement describes the habitat of polar bears?

Polar bears eat meat, so they are carnivores.

Polar bears are predators because they hunt other animals.

Polar bears live in the Arctic, where it is cold and icy.

Polar bears are active all year and do not hibernate.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Polar bears are actually black, not white.
Polar bear fur is translucent, and only appears white because it reflects visible light. Beneath all that thick fur, their skin is jet black.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which lists only abiotic factors in this environment?

grass, tree, rock, soil

bird, turtle, grass, tree

sun, water, grass, soil

water, rock, soil, sun

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the correct order of ecological organization beginning with the smallest level and ending with the largest.

Population, community, organism, ecosystem

Ecosystem, community, population, organism

Organism, population, community, ecosystem

Organism, community, population, ecosystem

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which are examples of abiotic factors? Select three options.

Sunlight

Oxygen

Rotting leaves

Stones

Fungi

Tags

NGSS.MS-LS2-3

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which are examples of biotic factors? Select three options.

Sunlight

Animals

Rotting leaves

Stones

Fungi

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which level of ecological organization includes both biotic and abiotic factors?

an ecosystem

a population

a community

an organism

Tags

NGSS.MS-LS2-3

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Unit 4 Review: Ecosystems

Which statement describes the habitat of polar bears?

Polar bears are actually black, not white.
Polar bear fur is translucent, and only appears white because it reflects visible light. Beneath all that thick fur, their skin is jet black.

Which lists only abiotic factors in this environment?

Identify the correct order of ecological organization beginning with the smallest level and ending with the largest.

Which are examples of abiotic factors? Select three options.

Which are examples of biotic factors? Select three options.

Which level of ecological organization includes both biotic and abiotic factors?

Which two levels of ecological organization include members of only a single species?

Identify the correct order of ecological organization beginning with the largest level and ending with the smallest.

Which statement best describes ecological succession?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Unit 4 Review: Ecosystems

Which statement describes the habitat of polar bears?

Polar bears are actually black, not white.Polar bear fur is translucent, and only appears white because it reflects visible light. Beneath all that thick fur, their skin is jet black.

Which lists only abiotic factors in this environment?

Identify the correct order of ecological organization beginning with the smallest level and ending with the largest.

Which are examples of abiotic factors? Select three options.

Which are examples of biotic factors? Select three options.

Which level of ecological organization includes both biotic and abiotic factors?

Which two levels of ecological organization include members of only a single species?

Identify the correct order of ecological organization beginning with the largest level and ending with the smallest.

Which statement best describes ecological succession?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Polar bears are actually black, not white.
Polar bear fur is translucent, and only appears white because it reflects visible light. Beneath all that thick fur, their skin is jet black.