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WorksheetsEcosystems and Carbon Cycle
Total questions: 75
Worksheet time: 1hrs 4mins
What is a limiting factor in an ecosystem?
A resource that increases population size indefinitely
A factor that causes population growth to decrease
A factor that has no impact on population size
A resource that is unlimited in an ecosystem
Which of the following is an example of competition as a limiting factor?
Two species of birds nesting in different types of trees
A lion hunting a zebra
Two species of fish eating the same type of algae
A bear hibernating during winter
What is mutualism in symbiosis?
A relationship where both species benefit
A relationship where one species benefits and the other is harmed
A relationship where one species benefits and the other is unaffected
A relationship where both species are harmed
In a food web, what are producers?
Animals that eat other animals
Organisms that produce their own food through photosynthesis
Animals that eat plants
Organisms that decompose dead matter
What defines a predator-prey relationship in food chains?
A relationship where both organisms benefit
A relationship where one organism eats the other
A relationship where one organism helps the other find food
A relationship where both organisms compete for food
Which of the following best describes parasitism?
A symbiotic relationship where both organisms benefit
A symbiotic relationship where one organism benefits and the other is harmed
A symbiotic relationship where one organism benefits and the other is unaffected
A symbiotic relationship where both organisms are harmed
What does carrying capacity refer to?
The maximum number of individuals an ecosystem can support indefinitely
The speed at which a population grows
The total biomass an ecosystem can produce
The number of species an ecosystem can support
Which of the following is a consumer in a food web?
A grass plant
A wolf eating a deer
Sunlight
Water
How does competition affect the carrying capacity of an ecosystem for a particular species?
It increases the carrying capacity by reducing the population size
It decreases the carrying capacity by increasing the population size
It decreases the carrying capacity by limiting resources
It has no effect on the carrying capacity
What role do decomposers play in a food web?
They produce their own food through photosynthesis
They eat live plants and animals
They break down dead organisms and recycle nutrients
They compete with producers for sunlight
Which of the following is an example of mutualism?
A tick feeding on a dog
A bee pollinating a flower while collecting nectar
A lion hunting a gazelle
A bird eating seeds and not dispersing them
Why are producers important in food chains?
They are the primary source of energy for all other organisms
They consume the most energy
They decompose organic material
They are the largest organisms in the ecosystem
What happens when a predator overhunts its prey?
The predator population increases indefinitely
The prey population becomes extinct
The predator population may decrease due to lack of food
The ecosystem becomes more stable
In a parasitic relationship, what happens to the host?
It benefits and grows healthier
It is unaffected
It is harmed and may become weaker
It becomes a parasite to another organism
How does mutualism differ from parasitism?
In mutualism, both organisms are harmed
In parasitism, both organisms benefit
In mutualism, both organisms benefit, while in parasitism, one benefits and the other is harmed
There is no difference; both terms describe the same relationship
What is the primary function of carnivores in an ecosystem?
To decompose dead organic matter
To produce their own food through photosynthesis
To regulate the population of herbivores and other prey species
To pollinate plants
What is the role of herbivores in an ecosystem?
They decompose dead organic matter
They consume plants, transferring energy from producers to consumers
They produce their own food through photosynthesis
They regulate the population of carnivores
How do apex predators influence the structure of a food web?
By increasing the number of primary producers
By controlling the population of herbivores and smaller predators
By competing with decomposers for nutrients
By directly consuming decomposers
Which of the following best describes the flow of energy in a food web?
From decomposers to producers to consumers
From producers to consumers to decomposers
Equally in all directions
From consumers to producers to decomposers
Which of the following organisms is typically found at the top of a food chain?
Primary producers
Primary consumers
Secondary consumers
Apex predators
How do primary producers obtain their energy?
By consuming other organisms
Through photosynthesis
By decomposing organic matter
From mineral absorption
Make their own food for energy
producers
herbivores
omnivores
carnivores
Get their energy from consuming plants (primary consumers)
producers
herbivores
omnivores
carnivores
Grasses directly pass energy to...
grasshopper, frog, bird
mouse, rabbit, grasshopper
rabbit, fox, snake
frog, owl, mouse
What is the frog considered in this food web?
producer
primary consumer
secondary consumer
tertiary consumer
Which would NOT be considered an apex predator?
fox
owl
hawk
snake
The frog in this food web could be considered a second-level and third-level consumer.
true
false
The stork uses its saw-like bill to cut up the dead animals it eats. As a result, the dead animal carcass is accessible to some bees for food and egg laying. The relationship neither harms nor benefits the stork.
parasitism
commensalism
mutualism
Which of the following shows the symbiotic relationship between the Rodent and the Bird?
Mutualism
Commensalism
Competition
In a parasitic relationship, one organism is harmed and one organism is benefiting.
helped
harmed
not effected
happy
A tick is a parasite to a horse. Which statement best describes the relationship between the tick and the horse?
The tick helps the horse get food.
The tick harms the horse by feeding on its blood.
The horse harms the tick by feeding on its blood.
The tick does not affect the horse.
The respiratory system includes the lungs. What level of body organization are the lungs?
A. tissue
B. organ
C. cell
D. organ system
Pick the correct order of body organization.
Organ system, tissue, cell, organ
Cell, tissue, organ, organ system
Organ, Cell, Tissue, Organ System
Cell, Tissue, Organ system, Organ
The smallest unit of organization in an animal's body is:
cells
organs
tissues
organ systems
Which type of scientific investigation is primarily used in establishing the relationship between two variables under controlled conditions?
Descriptive research
Experimental research
Correlational research
Meta-analysis
In which type of scientific investigation would a researcher observe phenomena in natural settings without manipulation?
Experimental research
Descriptive research
Correlational research
Review
Which process in the carbon cycle involves the release of carbon dioxide into the atmosphere by plants and animals?
Photosynthesis
Decomposition
Respiration
Carbon Sequestration
What role do oceans play in the carbon cycle?
They release carbon dioxide into the atmosphere
They absorb carbon dioxide from the atmosphere
They produce carbon through underwater volcanoes
They have no role in the carbon cycle
How does deforestation affect the carbon cycle?
It increases the amount of carbon dioxide absorbed by plants
It decreases the amount of carbon stored in soil
It increases the amount of carbon dioxide in the atmosphere
It has no significant effect on the carbon cycle
What is the role of photosynthesis in the carbon cycle?
It releases carbon dioxide into the atmosphere
It converts carbon dioxide into organic matter using sunlight
It has no role in the carbon cycle
It breaks down organic matter, releasing carbon dioxide
How do human activities impact the carbon cycle?
By increasing the amount of carbon dioxide in the atmosphere through burning fossil fuels
By decreasing the amount of carbon dioxide in the atmosphere through afforestation
Human activities have no impact on the carbon cycle
By converting carbon dioxide into oxygen, thus reducing greenhouse gases
What role do decomposers play in the carbon cycle?
They convert carbon dioxide into oxygen
They store carbon for long periods of time
They release carbon back into the atmosphere by breaking down dead organisms
They have no role in the carbon cycle
What process in the carbon cycle involves the conversion of carbon dioxide into organic compounds by plants?
Respiration
Photosynthesis
Decomposition
Fossilization
Which reservoir of the carbon cycle contains the largest amount of carbon?
The atmosphere
Terrestrial biosphere
Oceans
Fossil fuels
How do human activities, specifically the burning of fossil fuels, affect the carbon cycle?
They decrease the amount of carbon in the atmosphere
They have no significant impact on the carbon cycle
They increase the amount of carbon in the atmosphere
They increase the amount of carbon in the terrestrial biosphere
What pigment is primarily responsible for absorbing light energy in photosynthesis?
Chlorophyll
Carotene
Xanthophyll
Phycobilin
In which part of the plant does photosynthesis primarily take place?
Roots
Stems
Leaves
Flowers
Where does photosynthesis occur?
mitochondria
chloroplast
animal cells
ribosomes
Which of the following are products of photosynthesis? (Select 2)
glucose
light
water
oxygen
What type of energy conversion occurs in photosynthesis?
Light from the sun to chemical in glucose
Chemical in glucose to chemical in ATP
True or false: ATP is produced during photosynthesis
True
False
Which of the following are products of photosynthesis?
glucose and oxygen
glucose and water
carbon dioxide and water
ATP and sunlight
Which of the following is a reactant of photosynthesis?
oxygen
carbon dioxide
ATP
glucose
Which of the following equations represents the overall chemical reaction for photosynthesis?
6O2+ 6H2O → C6H12O6+ 6O2
C6H12O6 + 6H2O→ 6O2+ 6O2
6CO2+ 6H2O→ C6H12O6+ 6O2
6O2 + 6H2O→ C6H12O6 + 6CO2
What is a group of atoms bonded together?
Products
Molecule
Microorganism
Reactants
What is a substance that is a part of a reaction and goes through a change?
Reactants
Product
Molecule
Chloroplasts
What is a substance that is formed after a reaction has occured?
Autotroph
Consumer
Product
Heterotroph
Law of conservation of mass states that mass is neither (a) nor (b) in chemical reactions.
(a) is the process in which carbon dioxide and water combine, using energy from the Sun, to make sugar and oxygen.
Why do humans NEED plants to survive?
They produce water we drink
We eat them for energy
We breath the oxygen they release
They absorb the carbon dioxide we release
Photosynthesis could not happen without
The sun
The ocean
Their flowers
Their stems
Photosynthesis is the process where:
Plants turn green
Plants make their own food
Plants grow
Plants make flowers
Can animals make their own food?
Yes
No
Based on the diagram, which of the following materials does cellular respiration produce that plants use in photosynthesis?
Carbon dioxide and water
Carbon dioxide and energy
Glucose and oxygen
Sunlight, carbon dioxide and water
Identify each of the following images to the correct answer:
The products of cellular respiration
Produces energy in cells
The reactants of cellular respiration
The organelles in which cellular respiration occurs
The main energy molecule for cells
What is the purpose of having mitochondria in plant cells when they already have chloroplast?
to store water
to transform energy from sunlight into sugar
to transform sugar into energy
to store nutrients
Which organisms preform cellular respiration? (select all that apply)
humans
trees
rocks
bandicoots
rain
