Energy Transformations, Conservation & Dissipation — Drills · Grade 6 Science
Chapter: Energy, Heat & Thermal DesignWhat these drills covers
By the end of Energy Transformations, Conservation & Dissipation you should be able to:
- I can calculate efficiency as useful output divided by total input.
- I can explain how energy can be conserved and wasted at the same time.
- I can explain why dissipated energy cannot easily be collected and reused.
4 questions, multiple choice and written answer, each with a worked explanation.
Vocabulary used: conservation of energy, dissipation, evidence, system boundary, uncertainty.
Problem 1
- A sample with missing measurements has proved those values are zero.
- Energy that is less useful has been destroyed.
- Conservation means every individual object must keep the same energy.
- conservation of energy: Energy remains accounted for across a complete system and its transfers.
Answer and explanation
conservation of energy: Energy remains accounted for across a complete system and its transfers.
Energy remains accounted for across a complete system and its transfers.
Problem 2
- dissipation: Energy spreading into less readily useful forms or surroundings for the chosen purpose.
- Conservation means every individual object must keep the same energy.
- Energy that is less useful has been destroyed.
- Repeating any method makes every causal claim true.
Answer and explanation
dissipation: Energy spreading into less readily useful forms or surroundings for the chosen purpose.
Energy spreading into less readily useful forms or surroundings for the chosen purpose.
Problem 3
Answer and explanation
Yes. Usefulness depends on the intended function; conservation is not a judgment about whether the output is desirable.
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. Check omitted pathways, stored changes, and measurement uncertainty. The record is incomplete under its stated account.
Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.