Basic Ecosystem
What makes up an ecosystem?
A) Only living things
B) Only nonliving things
C) The living and nonliving things in a particular area
C) The living and nonliving things in a particular area
Which type of organism makes its own food through photosynthesis?
A) Consumer
B) Producer
C) Decomposer
B) Producer
Animals that eat only grasses or other plants are called?
A) Herbivores
B) Carnivores
C) Omnivores
A) Herbivores
Some organisms break down dead things for food. What are they called?
A) Consumers
B) Producers
C) Decomposers
C) Decomposers
What is the process that plants use to make food?
A) Photosynthesis
B) Carbon dioxide
C) Recycling
A) Photosynthesis
Which statement is true about predators and prey?
A) Predators hunt other animals; prey are hunted
B) Prey hunt other animals; predators are hunted
C) Predators eat plants; prey eat other animals
a
Which of the following is a producer?
A) Caterpillar
B) Tree
C) Worm
B) Tree
Animals that eat both plants and animals are called?
A) Herbivores
B) Omnivores
C) Carnivores
B) Omnivores
Why are decomposers important in an ecosystem?
A) They break down dead plants and animals
B) They produce more food for other organisms
C) They are carnivores and control animal populations
A) They break down dead plants and animals
In photosynthesis, what three things do plants need to make their own food?
A) Sunlight, water, carbon dioxide
B) Oxygen, water, carbon dioxide
C) Oxygen, carbon dioxide, water
A) Sunlight, water, carbon dioxide
Which of the following lists has ONLY consumers?
A) Grass, rabbits, foxes
B) Eagles, snakes, mice
C) Acorns, squirrels, owls
B) Eagles, snakes, mice
What is a producer?
B) An animal that eats only plants
C) An organism that gets energy by eating other organisms
Sheep eat grass and other plants but not animals. What kind of animal is a sheep?
A) Herbivore
B) Carnivore
C) Omnivore
A) Herbivore
What do we call the organisms that eat dead plants and animals, live in the soil, and return nutrients to the ground?
A) Herbivores
B) Carnivores
C) Decomposers
C) Decomposers
What is the primary source of energy for most organisms?
A) Carbon dioxide
B) Sunlight
C) Water
B) Sunlight
Why do animals need to eat plants or animals that have eaten plants?
A) Animals absorb energy from sunlight
B) Animals cannot make their own energy
C) Animals keep the plant population under control
B) Animals cannot make their own energy
Why do plants need light to survive?
A) Plants use energy from the sun to make food
B) Plants need light to keep warm
C) Plants need light to attract insects
A) Plants use energy from the sun to make food
If a pet shop worker says your pet is a carnivore, what would it eat?
A) Plants only
B) Crickets and mealworms
C) Plants and mealworms
B) Crickets and mealworms
Which fact belongs in the Decomposers column of a chart?
A) Eats plants
B) Uses photosynthesis
C) Returns nutrients to the soil
C) Returns nutrients to the soil
Look at the picture of a pond ecosystem. Which organism uses sunlight to produce food that others eat?
A) Snail
B) Green algae
C) Butterfly
B) Green algae
If an ecosystem loses a major predator, which effect is most likely?
A) Prey population increases
B) Producers disappear
C) Decomposers die off
A) Prey population increases
If a plant cannot get enough sunlight, what is most likely to happen?
A) It will produce more flowers
B) It cannot make enough food and may die
C) It will turn into a decomposer
B) It cannot make enough food and may die
If a new carnivore is introduced to an ecosystem, what could happen?
A) Prey populations might decrease
B) All plants will grow faster
C) Decomposers will eat the new carnivore
A) Prey populations might decrease
What would most likely happen if decomposers disappeared from an ecosystem?
A) Dead plants and animals would pile up
B) Predators would disappear immediately
C) Plants would no longer perform photosynthesis
A) Dead plants and animals would pile up
If sunlight is blocked for a long time in an ecosystem, which is most likely?
A) Producers cannot make food, affecting all other organisms
B) Predators become producers
C) Decomposers will start making food
Producers cannot make food, affecting all other organisms