Energy Pyramids & Transfer Efficiency — Drills · Grade 7 Science
Chapter: Ecosystems, Matter & EnergyWhat these drills covers
By the end of Energy Pyramids & Transfer Efficiency you should be able to:
- I can explain energy pyramids & transfer efficiency.
- 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: trophic position, transfer efficiency, energy pyramid, biomass, energy budget.
Problem 1
Which quantity belongs on an energy pyramid?
- Energy per stated boundary and interval
- Only individual names
- An uncalibrated image width
- A genetic allele letter
Answer and explanation
Energy per stated boundary and interval
Define energy units and comparable spatial and time boundaries.
Problem 2
A stipulated 10% transfer starts with 800 units. How many reach the next level?
Answer and explanation
80 energy units
0.10×800=80 under the stipulated rule.
Problem 3
Why can a few trees support many insects without contradicting energy flow?
Answer and explanation
Individual count differs from energy amount; organisms vary greatly in size and available energy.
Problem 4
Does lower energy at the next position violate conservation?
Answer and explanation
No. Energy has other transfers and destinations; it is not all captured as next-level food.