Which of the following best describes secondary succession?

Occurs after a disturbance like fire

Occurs on bare rock after a volcano

Which of the following best explains why increased biodiversity can lead to greater ecosystem survival?

More species provide more stability and resilience to change

More species means more competition

Fewer species are easier to manage

Biodiversity decreases food sources

A coastal marsh is experiencing rising sea levels. Using your knowledge of marsh stability, what is a likely long-term effect on the ecosystem?

Loss of marsh habitat and decreased stability

Increased land area for marsh plants

If deforestation continues in a tropical rainforest, what is a likely impact on the carbon cycle?

Increased carbon dioxide in the atmosphere due to less photosynthesis

Increased carbon storage in trees

Decreased carbon dioxide in the atmosphere

A lake receives excess nutrients from agricultural runoff. Predict the most probable sequence of events that will occur in the lake ecosystem.

Algae bloom, decreased oxygen, fish die-off

Decreased algae growth, increased fish population

Increased water clarity, more aquatic plants

Explain how the removal of producers from a food web can affect the stability of the ecosystem.

It leads to instability due to lack of energy input at the base

It increases the number of consumers

It has no effect on the ecosystem

Given the cycle of climate cooling and warming over the past 2000 years, what evidence would you use to determine if current warming is unusual?

Compare current temperature trends to historical climate data

Only look at weather from the past year

If coral reefs are destroyed, what is a likely impact on pollution levels in nearby coastal waters?

Pollution levels will increase due to loss of natural filtration

A region experiences increased acid rain. Predict the effect on local plant and animal species.

Some species may decline or disappear due to sensitivity to pH changes

Species diversity will increase

How does the increase of greenhouse gases lead to rising sea levels?

Greenhouse gases trap heat, melting ice and expanding ocean water

Greenhouse gases cool the Earth, causing water to freeze

Greenhouse gases have no effect on sea levels

Greenhouse gases decrease rainfall

If a fire destroys a forest, what type of ecological succession will most likely follow?

Secondary succession, starting with remaining soil and seeds

Primary succession, starting with bare rock

A food chain is disrupted by the loss of a top predator. What is a likely consequence for the trophic pyramid?

Overpopulation of prey species, leading to imbalance

Increased stability at all levels

Explain how deforestation can lead to increased runoff and algae blooms in nearby water bodies.

Deforestation removes plants that absorb water, increasing runoff and nutrient flow to water bodies, causing algae blooms

Deforestation increases plant cover, reducing runoff

Deforestation has no effect on runoff

Deforestation decreases nutrient flow

Why is the movement of carbon between the atmosphere and living things important for ecosystem health?

It ensures a balance of carbon, supporting life processes like photosynthesis and respiration

A volcanic eruption creates new land. What is the first step in primary succession on this land?

Colonization by pioneer species like lichens and mosses

Which is the correct food chain order?

Plant-->1st Consumer--> 2nd Consumer

Plant <-- 1st Consumer <-- 2nd Consumer

2nd consumer --> 1st consumer --> Plant

1st Consumer --> 2nd consumer --> Plant

Unit 7 Biosphere

Authored by Patricia Fettinger

Science

9th Grade

NGSS covered

Used 2+ times

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Increased habitat stability

Habitat loss

Increased biodiversity

More producers

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Unit 7 Biosphere

Which of the following is an abiotic factor in an ecosystem?

What is the main gas responsible for the greenhouse effect?

Which process removes carbon dioxide from the atmosphere?

What is the primary cause of acid rain?

Which of the following best describes a food web?

What is the first trophic level in a trophic pyramid?

Which of the following is a result of deforestation?

What is runoff most likely to cause in aquatic ecosystems?

Which of the following is a biotic factor?

What happens to sea levels as global temperatures rise?

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