Teacher: Date:
Each student should be able to…
7.5C: Diagram the flow of energy through living systems, including food chains, food webs, and energy pyramids.
1. All organisms must obtain energy from their environment. Every organism needs this energy in order to grow and reproduce. How do producers obtain energy?
A. They obtain energy by eating plants, bacteria and algae.
B. They extract chemical energy from decaying organic matter.
C. They extract energy from the chemicals in soil air and water.
D. They capture energy from sunlight and manufacture their own food.
2. Each organism has its own role in a food web. Organisms can be producers, consumers or decomposers. Which of these organisms can be classified as a decomposer?
- b. c. d.
3. A student is identifying food chains in a diagram of a food web. Which of the following organisms might be a tertiary consumer?
- Frog c. Great white shark
- Redwood tree d. Athlete’s foot fungus
4. Which of the following consumers is an herbivore?
- Cat c. Human
- Horse d. Vulture
5. The African savanna is a grassland scattered with shrubs and small trees. Some of the organisms that live in the savanna are shown below. Which two types of organisms have a producer-consumer relationship in this African savanna?
a. Zebras and hyenas c. Trees and elephants
b. Hyenas and cheetahs d. Fungi and dung beetles
6.
In the aquatic food web above, which two organisms have a predator-prey relationship?
a. Shad and sturgeons c. Blue crabs and Rangia clams
b. Sturgeons and blue crabs Copepods and amphipods
7. The flow of energy in some Australian food chains is modeled in the energy pyramid. Based on the model, which consumers would receive the greatest amount of energy captured by the producers in their food chains?
a. Wedge-tailed eagles b. Chuditch c. Ring-tailed opossums d. Eucalyptus trees
8. Which of these correctly describes a relationship between organisms in the soil food web below?
a. Protozoa get nutrients from small arthropods. C. Nematodes prey on arthropods
b. mammals are predators of birds. D. Bacteria get nutrients from organic matter.
9.
Which ecosystem would be more likely to survive if a disease killed the grasses?
a. The forest ecosystem, because most of the animals can eat other organisms.
b. The grassland ecosystem, because several predators compete for food.
c. The forest ecosystem, because it has three top predators
d. The grassland ecosystem, because it has many herbivores.
10. Some students are studying the relationships between organisms in a food web. How many predators shown in this food web are omnivores? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.