Food Chains, Food Webs & Energy Flow — Drills · Grade 6 Science
Chapter: Ecosystems, Watersheds & ConservationWhat these drills covers
By the end of Food Chains, Food Webs & Energy Flow you should be able to:
- I can explain why energy flows through an ecosystem while matter cycles within it.
- I can use the ten per cent figure to calculate energy at each feeding level.
- I can explain why food chains rarely have more than four or five levels.
4 questions, multiple choice and written answer, each with a worked explanation.
Vocabulary used: producer, food web, evidence, system boundary, uncertainty.
Problem 1
- A sample with missing measurements has proved those values are zero.
- Food-web arrows always point from predator toward prey.
- Every feeding transfer has exactly the same universal percentage.
- producer: An organism that builds organic matter using an energy source rather than feeding on organic food.
Answer and explanation
producer: An organism that builds organic matter using an energy source rather than feeding on organic food.
An organism that builds organic matter using an energy source rather than feeding on organic food.
Problem 2
- food web: A model of connected feeding relationships among organisms.
- Every feeding transfer has exactly the same universal percentage.
- Food-web arrows always point from predator toward prey.
- Repeating any method makes every causal claim true.
Answer and explanation
food web: A model of connected feeding relationships among organisms.
A model of connected feeding relationships among organisms.
Problem 3
Answer and explanation
No. They follow other pathways, including uneaten material, waste, activity, and thermal transfers; the model must account for them.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.
Problem 4
Answer and explanation
No. Quantitative prediction requires population, feeding, movement, and time information beyond the drawn links.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.