Habitats, Resources & Population Change — Drills · Grade 7 Science
Chapter: Ecosystems, Matter & EnergyWhat these drills covers
By the end of Habitats, Resources & Population Change you should be able to:
- I can explain habitats, resources & population change.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice, numeric and written answer, each with a worked explanation.
Vocabulary used: population, community, biotic factor, abiotic factor, carrying capacity.
Problem 1
Which is an abiotic factor?
- Temperature
- A predator
- A decomposer
- A competing plant
Answer and explanation
Temperature
Temperature is a physical condition, while the others involve organisms.
Problem 2
A population of 40 gains 10 and loses 7 under a complete model. Find ending count.
Answer and explanation
43 individuals
40+10−7=43.
Problem 3
Why should a count include area and effort?
Answer and explanation
Without them, equal or different counts might reflect different survey scope rather than biological change.
Problem 4
Why can carrying capacity change?
Answer and explanation
Resources, habitat, and environmental conditions change, altering what the modeled setting can support.