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WorksheetsMatter and Energy in an Ecosystem Test Review
Total questions: 48
Worksheet time: 34mins
Grace is learning about how plants and animals survive in nature. She wonders, what is the original source of energy for most ecosystems?
grass
humans
the sun
heat
Jackson is helping his teacher set up a science experiment with plants. He learns that during photosynthesis, plants make their own food. What is the food that plants produce during photosynthesis?
glucose
oxygen
starch
fat
During photosynthesis, which molecule do plants produce to store energy for later use?
sugar
water
fat
oxygen
Why is glucose important for plants after photosynthesis?
It stores energy for the plant to use.
It helps the plant absorb sunlight.
It provides water for the plant.
It produces oxygen for the plant.
In a forest, Samuel observes that when animals and plants die, their remains break down and enrich the soil. Which statement best explains why decomposers are an important part of this process?
They use sunlight to make their own food.
They give off oxygen for animals to breathe.
They provide camouflage for small animals.
They make nutrients available to plants.
Imagine a forest where decomposers, hawks, and foxes all live. Of these consumers, which one is the highest in the food chain?
decomposers
hawks
foxes
What do we call organisms that help recycle nutrients by feeding on dead plants and animals?
herbivores
decomposers
producers
predators
Which of the following is NOT a biotic factor?
Grass
Fish
Temperature
Bacteria
During a science field trip to a lake, Avery observes different things in the water. Which of the following is an abiotic factor in the lake ecosystem?
Fish
Whales
Phytoplankton
Carbon
If you were to classify 'Salinity' in an ocean ecosystem, would it be considered abiotic or biotic? Explain your reasoning.
Biotic, because it involves living organisms
Abiotic, because it is a non-living chemical property
Biotic, because it affects fish
Abiotic, because it is a type of animal
Imagine you are studying a pond ecosystem. Which of the following pairs correctly matches a biotic factor and an abiotic factor?
Fish and Water
Oxygen and Whales
Salinity and Zooplankton
Phytoplankton and Carbon
Which process is responsible for producing carbon dioxide (CO₂) that is used in photosynthesis?
Photosynthesis in plants
Cellular respiration in animals
Cellular respiration in plants
Photosynthesis in animals
Which process removes carbon dioxide (CO₂) from the atmosphere and releases oxygen (O₂)?
Photosynthesis in plants
Fermentation in yeast
Respiration in animals
Decomposition by bacteria
Which part of the cell is responsible for producing most of the cell's energy through respiration?
Mitochondria
Nucleus
Ribosome
Chloroplast
What is a closed ecosystem made by humans called?
biodome
biotic matter
photosynthesis
cellular respiration
Hannah is running a race and her muscles need energy to keep moving. What is the chemical reaction between oxygen and glucose in her cells that releases this energy called?
photosynthesis
cellular respiration
biotic matter
biodome
Grace is exploring a garden and notices both rocks and plants around her. What is the difference between abiotic and biotic matter in this garden? Give me an example of each.
Abiotic matter is non-living, like water; biotic matter is living, like a plant.
Abiotic matter is living, like a tree; biotic matter is non-living, like a rock.
Abiotic matter is always made by humans; biotic matter is always found in nature.
Abiotic matter is only found in the ocean; biotic matter is only found on land.
Which of the following is NOT a method that wetland managers have tried to remove purple loosestrife?
Introducing European beetles.
Burning.
Hand-pulling.
Using herbicides.
Which BEST describes how the removal of the trees and plants will affect the level of carbon in the atmosphere?
The level of carbon in the atmosphere will decrease because there are fewer sinks in the ecosystem.
The level of carbon in the atmosphere will increase because there are fewer sinks in the ecosystem.
The level of carbon in the atmosphere will decrease because there are fewer sources in the ecosystem.
The level of carbon in the atmosphere will increase because there are fewer sources in the ecosystem.
What role do decomposers play in an ecosystem?
They are primary consumers.
They compete with producers for sunlight.
They break down dead organisms and recycle nutrients.
They produce energy from sunlight.
Which process in plants uses sunlight to convert carbon dioxide and water into glucose and oxygen?
Cellular respiration
Photosynthesis
Fermentation
Decomposition
What would most likely happen to an ecosystem if all decomposers were removed?
Nutrient recycling would stop and dead matter would accumulate.
Primary consumers would increase in number.
Plants would grow faster.
There would be more oxygen in the atmosphere.
In this photo, what is an abiotic factor?
Deer
Grass
rain
All herbivores are _____.
producers
primary consumers
secondary consumers
tertiary consumers
If an organism uses photosynthesis to make its energy, it is a _____.
tertiary consumers
producer
primary consumer
secondary consumer
Any living thing, such as a fox, mouse, plant, bacteria, is an example of an ________.
organism
pet
abiotic factor
ecosystem
All the living things in an ecosystem are the _______ of an ecosystem.
ecosystem
abiotic factors
biotic factors
plants
A _________ is a diagram of all of the food chains in a single ecosystem.
food web
food chain
energy pyramid
primary consumer
A diagram that shows one possibility of energy flow in an ecosystem.
food web
energy pyramid
food chain
secondary consumer
Which organism is an example of a producer?
moth
mushroom
rose bush
cheetah
In the food chain below, which is the producer?
grass --> mouse --> snake --> hawk
grass
mouse
snake
hawk
Which level does energy flow directly to after the producer level?
Decomposer
Producer
Primary consumer
Secondary consumer
What would happen to this food chain if we doubled the population of the rabbits?
The populations of the snakes and hawks would also increase.
The populations of the grass, snakes, and hawks would decrease.
The grass population would decrease. The snake and hawk population would increase.
The grass and hawk population would decrease. The snake population would increase.
A organism that gets energy by eating both plants and animals.
omnivore
carnivore
herbivore
decomposer
Which of the following is NOT a function of chloroplasts?
produce glucose
produce carbon dioxide
store food energy
Organisms that cannot perform photosynthesis must eat the _____________ produced by plants and algae
leaves
carbohydrates
roots
Which of the following is NOT a purpose of cellular respiration?
take in nutrients
break down nutrients for energy
make glucose
What are the reactants of cellular respiration?
glucose and water
water and carbon dioxide
glucose and oxygen
How do animals get rid of carbon dioxide?
exhaling
inhaling
sweating
Sugar and oxygen are the___________________________ of cellular respiration
reactants
products
made because
What cell organelle do animals and plants both have that are needed for cellular respiration to occur?
chloroplasts
mitochondria
cytoplasm
In which way are photosynthesis and cellular respiration similar?
Both processes destroy energy.
Both create energy.
Photosynthesis breaks down sugar while cellular respiration produces sugar.
Both processes transfer energy from one form to another.
