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Ecosystems Quiz
Name:___________________
Directions: Choose the correct answer:
Examine the roles of consumers, producers, and decomposers in a biological community.
1. Which of the following eats producers?
a. Carnivore
b. Herbivore
c. Bacteria
d. Fungi
2. Plants and algae are the first organisms in most food chains because both plants and algae are ______________.
a. Consumers
c. Scavengers
b. Producers
d. Decomposers
3. What benefit do wastes broken down by decomposers provide to grassland soil?
a. They improve soil fertility
b. They decrease soil fertility
c. They provide no benefit to soil
d. They provide food for animals
4. What do a snake, a hawk, and a fox have in common?
a. They all produce their own food.
b. They all get most of their energy from eating animals.
c. They all get most of their energy from eating plants.
d. They are all decomposers.
5. Which organism in the food chain below is a producer?
a. Grass
b. Mouse
c. Snake
d. Hawk
6. Which of the following is an herbivore?
a. Lion
b. Tyrannosaurus
c. Wolves
d. Elephant
Describe how matter and energy are transferred through an ecosystem.
7. Hawks, grasses, songbirds, and caterpillars are some organisms found in an ecosystem. Which is the correct order
for energy transfer in this ecosystem?
a. caterpillars → hawks → grasses → songbirds
b. grasses → caterpillars → songbirds → hawks
c. hawks → caterpillars → grasses → songbirds
d. songbirds → grasses → hawks → caterpillars
8. Look at the sequence below. How can the wolf benefit from plants,
even if it never eats plants?
a. The rabbit eats the plants and the wolf eats the rabbit
b. The wolf eats the plants.
c. The plants make the rabbit run slower.
d. The rabbit eats the wolf and the grass decomposes the rabbit.
9. Which of the statements is true?
a. Energy transfers from sparrows to grasshoppers.
b. Energy transfers from eagles to snakes.
c. Energy transfers from grasshoppers to mice.
d. Energy transfers from snakes to mice.
10. Which of these would be affected immediately if energy from the sun were stopped?
a. The flying birds
b. The ability of wood to burn
c. The chemical reaction that makes ash
d. The growth of trees
11. What is the original source of energy for food webs in a land environment?
a. Plants
c. Cricket
b. Sunlight
d. Fox
12. What is the original source of energy that moves through a food web in an aquatic environment?
a. Plants
b. Algae
c. Fish
d. Sunlight
13. A food web is shown to the right. Food webs include several
connected food chains. Every food chain in this food web starts
with __________.
a. Foxes and hawks
b. Grasshoppers
c. Fungi and bacteria
d. Grasses and plants
Draw conclusions from data about interactions between biotic and abiotic elements of a
particular environment.
14. Which is considered biotic factor of an alpine forest?
a. Elk
b. Rainfall
c. Soil
d. Mountains
15. Which of these contains both abiotic and biotic elements in a desert environment?
a. Rocks and sunlight
b. Water and pebbles
c. Scorpions and sand
d. Roadrunners and snakes
16. The pictures show three abiotic features of ecosystems.
Which is the major characteristic of abiotic features?
a. They are all non-living.
b. They are in all ecosystems.
c. They are necessary for life.
d. They are impossible to measure.
17. Which of these lists identifies only biotic factors in a desert environment?
a. Sand, sunlight, rocks, and cacti
b. Producers, consumers, and decomposers
c. Plants, animals, sand, and rocks
d. Air, cacti, lizards, and soil nutrients
18. Which is an example of an abiotic element changing an area?
a. Introducing a new type of grass
b. Water flooding the area
c. Two species of birds competing
d. Algae growing on crabgrass
19. Rocks, temperature, and water are what part of the environment?
a. Biotic
b. Abiotic
c. Population
d. Living
20. Which statement is correct:
a. Population density is the number of populations within an area.
b. Population density is affected by biotic factors only.
c. Population density is affected by abiotic factors only
d. Population density is the number of populations in wide areas only