WorksheetsEcosystem Quiz
Total questions: 80
Worksheet time: 40mins
Which of these is a biotic component of an ecosystem?
Soil
Water
Plants
Which one is an abiotic factor?
Animals
Air
Grass
The term ecosystem refers to:
Only animals living together
Interaction of organisms with environment
Only plants in a forest
Which of these is a natural ecosystem?
Aquarium
Garden
Pond
Which is a man-made ecosystem?
Desert
Ocean
Aquarium
Which is NOT an ecosystem?
Forest
Lake
Chair
Which is the largest ecosystem?
Ocean
Forest
Desert
Which of these is a micro-ecosystem?
Garden
Aquarium
Ocean
Which one is a freshwater ecosystem?
River
Sea
Ocean
Which is a terrestrial ecosystem?
Pond
Forest
Ocean
Plants, animals and humans are part of:
Abiotic world
Biotic world
Both
Temperature, rainfall, and light are:
Biotic factors
Abiotic factors
Producers
Which is the smallest unit of ecosystem?
Organism
Population
Community
An ecosystem always has:
Only consumers
Producers, consumers, decomposers
Only producers
Which controls ecosystem energy flow?
Soil
Sun
Water
Plants are called producers because:
They make food through photosynthesis
They eat other organisms
They decompose waste
Which of these is a primary consumer?
Goat
Lion
Eagle
Which of these is a secondary consumer?
Deer
Grasshopper
Snake
Mushrooms are:
Producers
Consumers
Decomposers
Which organism is a tertiary consumer?
Grass
Tiger
Rabbit
Cows eat grass, so they are:
Herbivores
Carnivores
Omnivores
Humans who eat plants and meat are:
Herbivores
Omnivores
Carnivores
A lion is:
Herbivore
Carnivore
Producer
Which is NOT a consumer?
Tiger
Cow
Mango tree
Vultures are:
Decomposers
Scavengers
Producers
Fungi feed on:
Dead matter
Fresh leaves
Sunlight
Earthworms help the ecosystem as:
Producers
Decomposers
Carnivores
Which one is a carnivore?
Rabbit
Horse
Tiger
Which one is an omnivore?
Cow
Hen
Goat
Which is NOT a decomposer?
Mushroom
Bacteria
Grass
A simple food chain is:
Grass → Cow → Human
Lion → Deer → Grass
Grass → Goat → Lion
Which always starts the food chain?
Herbivore
Producer
Carnivore
Example of food chain in pond:
Algae → Fish → Bird
Fish → Algae → Bird
Bird → Fish → Algae
In food chain: Grass → Grasshopper → Frog → Snake → Eagle, the top carnivore is:
Frog
Snake
Eagle
If all plants disappear, food chains will:
Become stronger
Break down
Continue normally
Which of these is a food chain of grassland?
Grass → Deer → Tiger
Fish → Bird → Snake
Algae → Fish → Human
Which is a marine food chain?
Grass → Cow → Tiger
Phytoplankton → Fish → Seal
Algae → Frog → Snake
The main function of a food chain is:
Transfer of matter and energy
Growth of animals
Rainfall
Primary consumers eat:
Producers
Secondary consumers
Tertiary consumers
Example of desert food chain:
Cactus → Rat → Snake → Eagle
Grass → Cow → Lion
Algae → Fish → Bird
A hawk that eats a snake is a:
Primary consumer
Secondary consumer
Tertiary consumer
Which breaks the food chain?
Absence of producer
Absence of carnivore
Absence of decomposers
The correct order is:
Producer → Herbivore → Carnivore
Carnivore → Herbivore → Producer
Decomposer → Carnivore → Producer
Which is true about food chain?
Energy flows in one direction
Energy flows back and forth
Energy is recycled
In the food chain, each step is called:
Energy block
Trophic level
Energy pyramid
A food web is formed when:
One food chain exists
Many food chains interconnect
Only carnivores eat each other
Which shows a food web in a forest?
Deer only eating grass
Many animals eating plants and each other
Only lion eating deer
Advantage of food web over food chain:
Shows one path of energy flow
Shows many feeding relationships
Only includes carnivores
If tigers vanish from a food web, the population of:
Deer will increase
Deer will decrease
Grass will increase
The complexity of a food web depends on:
Climate only
Number of organisms and interactions
Size of ecosystem
Which food web includes man?
Grass → Cow → Human
Algae → Fish → Human
Both
Food webs are important because:
They keep balance in nature
They show energy waste
They harm ecosystems
More food chains in a food web means:
More stable ecosystem
Weaker ecosystem
No change
Which of these is a marine food web?
Phytoplankton → Fish → Seal → Shark
Grass → Goat → Tiger
Cactus → Rat → Snake
Which is at the base of all food webs?
Producers
Consumers
Decomposers
Energy in an ecosystem flows:
In a cycle
One direction
Randomly
The ultimate source of energy is:
Soil
Sun
Moon
In food chain, energy is lost as:
Heat
Water
Oxygen
Maximum energy is at:
Producers
Secondary consumers
Tertiary consumers
The 10% law means:
10% energy passes to next level
10% is lost
10% remains in soil
Energy pyramid is:
Always upright
Always inverted
Flat
At top of energy pyramid:
Producers
Primary consumers
Top carnivores
Which has most population in pyramid?
Producers
Carnivores
Herbivores
As we go up pyramid:
Energy decreases
Energy increases
Energy remains constant
Which energy conversion starts the cycle?
Sunlight → Chemical energy
Chemical → Heat
Heat → Light
Cactus has spines to:
Store food
Reduce water loss
Attract animals
Which animal depends on plants for oxygen?
Lion
Humans
Both
Plants depend on animals for:
Water
Pollination & seed dispersal
Light
Birds help plants by:
Making oxygen
Dispersing seeds
Providing shade
Bees and flowers show:
Competition
Mutualism
Parasitism
The relationship between a tick and a dog is:
Mutualism
Parasitism
Commensalism
When cattle graze on grass, this is:
Parasitism
Predation
Herbivory
An owl hunting a rat is:
Herbivory
Predation
Mutualism
Epiphytes growing on trees show:
Commensalism
Parasitism
Mutualism
Vultures cleaning dead bodies help by:
Recycling nutrients
Producing oxygen
Making food
Which adaptation helps fish breathe?
Gills
Lungs
Skin pores
Polar bears have thick fur to:
Store water
Keep warm
Swim faster
Camels store fat in humps for:
Water storage
Energy
Oxygen
Interdependence means:
Living things depending on each other
Living alone
Plants only depending on soil
Balance in ecosystem is maintained by:
Only carnivores
Interaction of producers, consumers, decomposers
Only decomposers
