Quiz about Biosphere Test

Question 1

What are abiotic factors in an ecosystem?

Accepted Answer

Temperature and sunlight

Answer

Animals and plants

Answer

Producers and consumers

Answer

Decomposers and predators

Question 2

Which biome is characterized by high temperatures and heavy rainfall throughout the year?

Accepted Answer

Tropical rainforest

Answer

Tundra

Answer

Desert

Answer

Taiga

Question 3

Which of the following best describes a food chain?

Accepted Answer

A linear sequence showing energy flow between organisms

Answer

A network of interconnected food webs

Answer

A diagram showing biodiversity in a biome

Answer

A map of abiotic factors in an ecosystem

Question 4

What percentage of energy is typically transferred from one trophic level to the next in an ecosystem?

Accepted Answer

10%

Answer

1%

Answer

50%

Answer

100%

Question 5

How does biodiversity contribute to ecosystem stability?

Accepted Answer

By enabling ecosystems to recover from disturbances

Answer

By reducing the number of species

Answer

By increasing competition among species

Answer

By causing the extinction of weaker species

Question 6

Which of the following is an example of a biotic factor in a coral reef ecosystem?

Accepted Answer

Coral polyps

Answer

Water temperature

Answer

Salt concentration

Answer

Ocean currents

Question 7

In which biome would you likely find permafrost?

Accepted Answer

Tundra

Answer

Desert

Answer

Savanna

Answer

Deciduous forest

Question 8

What role do decomposers play in an ecosystem?

Accepted Answer

They break down dead organic matter

Answer

They are primary producers

Answer

They consume primary consumers

Answer

They compete with primary producers

Question 9

Which biome is characterized by low precipitation and extreme temperature variations?

Accepted Answer

Desert

Answer

Grassland

Answer

Wetland

Answer

Riparian

Question 10

Which of the following factors is most likely to influence the type of vegetation found in a biome?

Accepted Answer

Altitude

Answer

Soil type

Answer

Predator species

Answer

Decomposer population

Question 11

Which process in the carbon cycle involves plants converting carbon dioxide into organic matter?

Accepted Answer

Photosynthesis

Answer

Cellular respiration

Answer

Decomposition

Answer

Combustion

Question 12

What is the primary effect of increased carbon dioxide levels on ocean ecosystems?

Accepted Answer

Ocean acidification

Answer

Increased biodiversity

Answer

Decreased temperature

Answer

Improved water clarity

Question 13

Which of the following is NOT a major carbon reservoir?

Accepted Answer

Metal ores

Answer

Atmosphere

Answer

Oceans

Answer

Living organisms

Question 14

How does decomposition contribute to the carbon cycle?

Accepted Answer

It releases carbon back into the soil and atmosphere.

Answer

It absorbs carbon dioxide from the atmosphere.

Answer

It stores carbon in living organisms.

Answer

It converts carbon dioxide into oxygen.

Question 15

Which process directly releases carbon dioxide into the atmosphere?

Accepted Answer

Cellular respiration

Answer

Photosynthesis

Answer

Ocean absorption

Answer

Nitrogen fixation

Question 16

Which of the following data sources is commonly used to analyze past climate conditions?

Accepted Answer

Ice cores

Answer

Photographs

Answer

Satellite images

Answer

Modern weather reports

Question 17

What can tree rings tell us about past climates?

Accepted Answer

The age of a tree and climate conditions during each year of growth

Answer

The color of past climates

Answer

The temperature of the past year

Answer

The future climate trends

Question 18

Which volcanic eruption is known to have caused a significant global cooling event?

Accepted Answer

Mount Tambora

Answer

Mount Vesuvius

Answer

Mount Fuji

Answer

Mount St. Helens

Question 19

What is the result of ocean acidification on marine life?

Accepted Answer

Harm to biodiversity

Answer

Increased growth of coral reefs

Answer

Enhanced fish reproduction

Answer

Neutral effect on ecosystems

Question 20

Which factor contributes to the increase of carbon dioxide in the atmosphere?

Accepted Answer

Combustion of fossil fuels

Answer

Photosynthesis

Answer

Ocean absorption

Answer

Soil respiration

Question 21

Which of the following is a consequence of disrupting the carbon cycle?

Accepted Answer

Climate change

Answer

Decreased atmospheric oxygen levels

Answer

Increased plant growth

Answer

Stable global temperatures

Question 22

How does cellular respiration fit into the carbon cycle?

Accepted Answer

It releases carbon dioxide as a byproduct.

Answer

It converts carbon dioxide into glucose.

Answer

It stores carbon in the form of fossil fuels.

Answer

It absorbs carbon from the ocean.

Question 23

Lake and ocean sediments can provide information about past climates because they contain:

Accepted Answer

Fossils and chemical compositions

Answer

Dust from outer space

Answer

Layers of rock formations

Answer

Lava flows

Question 24

What is one way ice cores can be used to study past climates?

Accepted Answer

By examining the layers of ice for trapped gases like carbon dioxide

Answer

By analyzing pollen content

Answer

By measuring the amount of volcanic ash

Answer

By counting the number of ice layers

Question 25

How do fossils help scientists understand past climate conditions?

Accepted Answer

They indicate the type of vegetation and climate of the past

Answer

They show the exact temperature of the past

Answer

They provide evidence of extinct species

Answer

They reveal the cause of climate change

Question 26

What is the significance of coral records in climate studies?

Accepted Answer

They show ocean temperature and chemistry changes over time

Answer

They indicate the age of the ocean

Answer

They provide a habitat for fish

Answer

They are unaffected by climate change

Question 27

Which of the following is NOT a method used to investigate past climate conditions?

Accepted Answer

Star alignment observation

Answer

Ice core analysis

Answer

Tree ring study

Answer

Ocean sediment examination

Question 28

Human historical records can help scientists understand past climates by:

Accepted Answer

Providing firsthand accounts of weather and climate events

Answer

Offering predictions for future climate changes

Answer

Showing how ancient technology influenced the climate

Answer

Describing modern climate trends

Question 29

Periods of substantial volcanic activity have resulted in:

Accepted Answer

Global cooling events

Answer

Global warming events

Answer

No significant climate change

Answer

Decreased biodiversity

Question 30

Which abiotic factor is most likely to affect the distribution of plant species in a region?

Accepted Answer

Altitude

Answer

Species diversity

Answer

Trophic level

Answer

Genetic variation

Question 31

How does an increase in soil nitrates affect plant biodiversity?

Accepted Answer

It increases plant biodiversity by providing more nutrients.

Answer

It decreases plant biodiversity by making the soil less fertile.

Answer

It has no effect on plant biodiversity.

Answer

It decreases plant biodiversity by increasing the soil's acidity.

Question 32

What is the likely impact of ocean acidification on marine biodiversity?

Accepted Answer

It decreases biodiversity by harming coral reefs.

Answer

It increases biodiversity by creating new habitats.

Answer

It has no effect on marine biodiversity.

Answer

It increases biodiversity by reducing water temperature.

Question 33

Which of the following is an example of a persistent organic pollutant that can impact biodiversity?

Accepted Answer

Herbicides

Answer

Oxygen

Answer

Phosphates

Answer

Carbon dioxide

Question 34

What role does altitude play in species distribution?

Accepted Answer

Different altitudes create varied habitats affecting species distribution.

Answer

It has no effect on species distribution.

Answer

Higher altitudes support more biodiversity.

Answer

Lower altitudes support more biodiversity.

Question 35

How can habitat fragmentation negatively impact biodiversity?

Accepted Answer

By isolating populations and reducing genetic diversity.

Answer

By increasing genetic variation.

Answer

By creating more habitats for species.

Answer

By increasing the number of species in a habitat.

Question 36

Which of the following is true about bioaccumulation and its impact on trophic levels?

Accepted Answer

Organisms at higher trophic levels are more affected.

Answer

It affects all trophic levels equally.

Answer

Organisms at lower trophic levels are more affected.

Answer

It only affects plants.

Question 37

How might changes in air quality affect biodiversity?

Accepted Answer

Poor air quality can decrease biodiversity.

Answer

They have no effect on biodiversity.

Answer

Improved air quality can decrease biodiversity.

Answer

Poor air quality can increase biodiversity.

Question 38

What is the effect of climate trends on species distribution?

Accepted Answer

They cause shifts in species distribution.

Answer

They stabilize species distribution.

Answer

They have no impact on species distribution.

Answer

They reduce species distribution.

Question 39

Which of the following best describes ecosystem biodiversity?

Accepted Answer

The variety of species within a specific habitat.

Answer

The genetic variation within a population.

Question 40

What is meant by ecosystem resilience?

Accepted Answer

The ability of an ecosystem to return to equilibrium after a disturbance

Answer

The ability of an ecosystem to avoid ecological disturbances

Answer

The ability of an ecosystem to adapt to new species

Answer

The ability of an ecosystem to increase in size

Question 41

How does biodiversity influence the health of an ecosystem?

Accepted Answer

More biodiversity leads to a healthier and more stable ecosystem

Answer

More biodiversity makes an ecosystem less stable

Answer

Less biodiversity prevents ecological disturbances

Answer

Less biodiversity increases the ecosystem's resilience

Question 42

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

Accepted Answer

Temperature

Answer

Birds

Answer

Trees

Answer

Insects

Question 43

What happens during primary succession?

Accepted Answer

Development of an ecosystem on previously uninhabited land

Answer

Ecosystem recovery after a storm

Answer

Ecosystem changes due to human activity

Answer

Return of species to their original habitat

Question 44

Which ecological disturbance could lead to secondary succession?

Accepted Answer

Flooding of a forest

Answer

Volcanic eruption creating new land

Answer

Formation of a new island

Answer

Rising sea levels

Question 45

Which statement about secondary succession is true?

Accepted Answer

It occurs after a wildfire

Answer

It begins on bare rock

Answer

It starts with pioneer species

Answer

It only occurs in aquatic environments

Question 46

How can an insect outbreak affect ecosystem health?

Accepted Answer

Causes ecological disturbances

Answer

Stabilizes the food chain

Answer

Increases biodiversity

Answer

Promotes primary succession

Question 47

What distinguishes primary succession from secondary succession?

Accepted Answer

Primary succession is slower than secondary succession

Answer

Primary succession occurs in water, secondary on land

Question 48

What role do biotic factors play in an ecosystem?

Accepted Answer

They interact with abiotic factors to influence ecosystem health

Answer

They determine the amount of sunlight

Answer

They include non-living elements

Answer

They consist only of plants

Question 49

Why is ecosystem resilience important for biodiversity?

Accepted Answer

It allows ecosystems to recover and maintain biodiversity after disturbances

Answer

It ensures ecosystems remain unchanged

Answer

It prevents the introduction of new species

Answer

It eliminates competition among species

Question 50

Which combination of abiotic factors would most likely support a dense forest biome?

Accepted Answer

High precipitation, moderate temperatures, and rich soil nutrients

Answer

Low precipitation, high temperatures, and sandy soil.

Answer

High altitude, low temperatures, and rocky soil

Answer

Constant direct sunlight, low precipitation, and saline soil

Question 51

A local pond ecosystem has experienced a significant decrease in water pH due to acid rain.

Which of the following would most likely be a direct consequence of the change in pH on the

biotic factors within the pond?

Accepted Answer

A decrease in the population of aquatic organisms that are sensitive to pH level.

Answer

Increased water temperature during summer months

Answer

The introduction of a new species of fish from a nearby lake

Answer

An increase in the clarity of the water, making it easier for sunlight to penetrate

Question 52

If the pH changes to a level 5, what will most likely happen in this ecosystem?

Accepted Answer

The snail population will decrease.

Answer

The crayfish population will increase

Answer

The mayfly population will increase.

Answer

The salamanders will decrease,

Question 53

In a forest ecosystem model, beavers have built several dams on a river.

How does this action by the beavers primarily affect the abiotic factors in the forest

ecosystem?

Accepted Answer

c. Water is pooled in areas behind the dams, creating new wetland habitats and

altering the distribution of nutrients in the soil.

Answer

a. The flow of the river increases, leading to less water available for plants downstream.

Answer

b. The water temperature upstream of the dams decreases, affecting fish species

adapted to warmer waters.

Answer

d. The pH level of the water downstream from the dams increases.

Question 54

In a coastal marine ecosystem, various processes contribute to the carbon cycle. Which of

the following best describes the natural carbon cycling in a coastal marine ecosystem?

Accepted Answer

Respiration by marine organisms adds carbon to the atmosphere, and

photosynthesis by phytoplankton removes carbon from the atmosphere.

Answer

The decomposition of dead marine animals adds carbon to the geosphere, and

volcanic eruptions remove carbon from the atmosphere.

Answer

Combustion of fossil fuels adds carbon to the atmosphere, and the formation of coral

reefs removes carbon from the hydrosphere.

Answer

Decomposition of plastic waste in the ocean adds carbon to the hydrosphere, and

absorption of carbon dioxide by ocean water removes carbon from the geosphere.

3

September

Question 55

Shell-forming organisms such as corals and mollusks trap CO2 by forming their shells. A

marine ecosystem study has observed a decline in corals and mollusks due to ocean

acidification. When ocean acidification increases, what could be a potential long-term effect

of their decline on carbon dioxide?

Accepted Answer

Increased carbon dioxide levels in the atmosphere decreases the shell-forming

organisms.

Answer

Increased carbon dioxide levels in the atmosphere increases the shell-forming

organisms

Answer

Decreased carbon dioxide levels in the lithosphere turns fossil fuels into shells

Answer

Decreased carbon dioxide in the atmosphere increases photosynthetic plankton.

Question 56

Greenland ice core samples were collected and the results of the atmospheric CO2 levels

were placed into a graph.

What prediction about the future atmospheric conditions is supported by the data table?

Accepted Answer

b. A decrease in global temperatures if CO2 levels decrease

Answer

a. Global temperatures will increase if CO2 levels decrease

Answer

c. No change in global temperatures, as CO2 levels stabilize naturally

Answer

d. A rapid shift to an ice age due to sudden increase in CO2 levels

Question 57

Recent studies of ice core samples have shown that during periods when the Earth's

atmosphere contained higher concentrations of greenhouse gases, such as carbon dioxide

(CO2) and methane (CH4), the global temperatures were also elevated. This pattern suggests

a strong relationship between greenhouse gas concentrations and Earth's climate.

Which of the following conclusions can most accurately be drawn from the correlation

between high concentrations of greenhouse gases and global temperatures?

Accepted Answer

c. Higher greenhouse gas concentrations are associated with elevated global

temperatures, likely due to a stronger greenhouse effect.

Answer

a. Higher greenhouse gas concentrations cause a decrease in global temperatures due

to increased reflection of solar radiation.

Answer

b. Higher greenhouse gas concentrations in the atmosphere have no significant impact

on global temperatures, suggesting other factors are more important.

Answer

d. The correlation between high greenhouse gas concentrations and elevated global

temperatures is coincidental and unrelated to each other.

Question 58

Scientists use different ways to learn about Earth's past weather. These methods give special

clues about old climates, helping us understand climate changes better. Which option best

explains what these clues can tell us about how the weather was previously?

Accepted Answer

a. Ice cores can reveal past atmospheric composition indicating greenhouse gas

concentrations.

Answer

b. Ice cores can reveal past atmospheric composition by showing the occurrence of

hurricanes.

Answer

c. Tree rings can indicate past climate conditions such as the presence of greenhouse

gases.

Answer

d. Tree rings can indicate past climate conditions by providing records of aquatic life.

Question 59

CHECK OFF: Which of the following represents abiotic matter?

Accepted Answer

Rocks

Accepted Answer

Water

Accepted Answer

Air

Answer

Plants

Answer

Dead organism

Question 60

Researchers collected data on water pH, soil nutrient content, and air quality in various

ecosystems. Which of the following explanations explains why ecosystem B is most stable?

Accepted Answer

Ecosystem B has healthy air quality and high nutrient soil.

Answer

Ecosystem B has degraded soil and acidic water.

Answer

Ecosystem B has degraded soil and increased air pollution.

Answer

Ecosystem B has contaminated water and healthy air quality.

Question 61

Which statement best explains bioaccumulation?

Accepted Answer

Bioaccumulation refers to the gradual increase of pollutants within an

individual organism over time

Answer

Bioaccumulation occurs when a pollutant moves from a lower trophic level to a higher

one, increasing in concentration along the food chain.

Answer

Bioaccumulation is the process by which pollutants decrease in concentration as they

move up the food chain due to metabolic breakdown by organisms.

Answer

Bioaccumulation describes the rapid removal of pollutants from an ecosystem through

natural processes such as decomposition.

Question 62

How does biodiversity impact the environment?

Accepted Answer

Biodiversity increases the amount of genetic material in the environment and

helps stabilize ecosystems.

Answer

Biodiversity increases the chance organisms will go extinct due to a natural disaster

Answer

Biodiversity decreases the stability of an ecosystem.

Answer

Biodiversity decreases the ecological resources in an environment.

Question 63

Succession is like nature's way of healing and building ecosystems over time. Imagine it as

starting a new garden on empty land or fixing one after it's been damaged. At first, only

certain tough plants can grow in these tough spots, kind of like the first helpers. These

pioneers make the place better for other plants to come in later. There are two types: primary,

which is starting from scratch where there's no soil, and secondary, which is more like fixing

up an area where the ground is still okay but everything else is gone. Over time, more and

more different kinds of plants and animals move in, making the area richer and full of life until

it reaches a stable, happy community. This whole process shows how nature can bounce

back and fill empty or damaged spaces with life again.

According to the paragraph, which of the following best summarizes how succession brings

an ecosystem back to a healthy state?

Accepted Answer

Succession is nature's way of healing and rebuilding ecosystems over time,

starting with pioneer plants in damaged or barren areas, and gradually

introducing more diverse life forms until a stable, thriving community is

established.

Answer

Succession is a rapid process that instantly restores ecosystems to their original

state, without the need for pioneer species

Answer

Succession involves only the introduction of animals to an ecosystem to stimulate its

recovery and does not rely on plants.

Answer

Succession occurs when humans intervene to plant specific species in an ecosystem,

bypassing the natural recovery process.

Question 64

Forest fires might seem harmful, but they actually help forests grow back healthier. After a

fire, the land starts to heal. First, quick-growing plants, called pioneer species, pop up. These

plants are tough and can grow in the tough conditions left after a fire. They help get the forest

ready for other plants to come back. As time goes on, more plants and animals return,

making the forest full of life again. This process shows how forests can recover and even

become better places for plants and animals to live.

According to the paragraph, which of the following best summarizes the process of

succession after a forest fire?

Accepted Answer

Pioneer species quickly grow in the conditions left after a fire, preparing the

land for other plants and animals to return, gradually restoring the forest's

biodiversity and health.

Answer

Forest fires destroy all life in an area, and the ecosystem cannot recover without

human intervention.

Answer

After a forest fire, the area remains barren and lifeless, as the conditions are too

harsh for any new growth.

Answer

Forest fires permanently change the ecosystem to a state where only fire-resistant

species can survive, reducing biodiversity

Biosphere Test

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