Food Web Test (Friday)
In grade 7 science, we have completed the Interactions within Ecosystems unit. Students will be writing a test on the content of the second half of the unit (Food Webs) on Friday.
On Thursday, we will complete a series of review questions using a Jeopardy style game but there is still lots of studying that the students should be doing at their homes over the week in preparation for this test.
Like the previous mid-unit test, there are several terms students should be aware of and should be able to identify and explain each term. On Tuesday, we will be making terminology cards to help students remember the various terms and definitions involved in this portion of the unit. The following text pages and links will also be extremely helpful to reinforce the concepts from class:
- TEXTBOOK: Roles of Organisms in an Ecosystem
- VIDEO: What is a consumer?
- QUIZ: Producers and Consumers (Science Source)
- TEXTBOOK: Food Chains and Webs
- TEXTBOOK: Energy Flow in Webs
- VIDEO: Food Chains (Study Jams)
- VIDEO: Food Webs (Study Jams)
Here is a rundown of the test and the concepts that students should know before writing:
Part A (Knowledge and Understanding)
- Multiple Choice (14 questions)
- Matching (9 questions)
Part B (Communication)
- Paragraph answers (3 questions) – students will have the choice to write their answer or record themselves stating their answer orally
Part C (Making Connections/Applications)
- Food web analysis (4 question)
- Graphical analysis (1 question)
1) Classifying organisms in a food chain or web
- Terminology: producer, consumer (primary, secondary, tertiary, quaternary), decomposer, detritivore, scavenger, carnivore, herbivore, omnivore
- Example Question: In the food web, identify the secondary consumer and explain your choice.
- Example Question: Which organisms in the food web can classified as more than one order of consumer?
2) Energy transfer in food chains and webs
- Terminology: food chain, energy pyramid (pyramid of numbers)
- Example Question: How much energy is passed onto the next organism in the food chain? What happens to the other energy?
- Example Question: If grass creates 2300 kJ of energy, how much energy does the rabbit receive when it eats the grass? Explain.
3) Interactions within food webs
- Terminology: equilibrium, carrying capacity
- Example Question: Using the food web, explain three things that would happen if the grasshoppers were removed from the ecosystem.
- Example Question: Come up with a scenario that could result in the following graph:
Students will have the entire 50-minute block to write the test. Those looking for even more clarification/resources can check out Goal #3 of the Ecosystems workspace.