Human Activities, Habitat & Environmental Evidence — Drills · Grade 7 Science
Chapter: Ecological Evidence & Environmental DesignWhat these drills covers
By the end of Human Activities, Habitat & Environmental Evidence you should be able to:
- I can explain human activities, habitat & environmental evidence.
- 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: habitat fragmentation, infiltration, impervious surface, outcome, tradeoff.
Problem 1
Which is an outcome rather than only an activity count?
- Number planted on day one
- Surviving cover after a defined interval
- Number of notices printed
- Project name
Answer and explanation
Surviving cover after a defined interval
Surviving cover measures a later result, while initial planting is an action count.
Problem 2
A model receives 30 L rain input and has 9 L runoff. What percent becomes recorded runoff?
Answer and explanation
30 %
9/30×100=30% under the stated boundary and interval.
Problem 3
Why does a mapped barrier not prove an exact population loss?
Answer and explanation
Actual effects depend on movement, species needs, alternative routes, and observations not given by the line alone.
Problem 4
Why distinguish planted area from surviving cover?
Answer and explanation
Planting is an action; later survival and cover are outcomes requiring observations.