Energy Use and Environmental Impact
Explain the environmental implications of computer energy use and how monitor, power-down and standby settings affect it.
How to study National 5 Computing Science
Move from functional requirements to designs and implementation, trace data and code carefully, and support testing and evaluation with evidence.
Core concepts
Concept 1
Electricity consumed by computer systems can contribute to environmental harm depending on its generation.
Exam cue: Link a setting to reduced operating time or reduced power demand.
Concept 2
Monitor settings and automatic power-down can reduce unnecessary energy use.
Exam cue: Describe an environmental effect rather than giving only a financial saving.
Concept 3
Standby can use less energy than full operation but may still consume power.
Risk pitfalls and guardrails
Claiming standby always means zero energy use.
Guardrail: Check option route, data type, valid boundary, loop condition, array index, identifier and expected output before committing to the response.
Naming a setting without explaining how it changes energy consumption.
Guardrail: Check option route, data type, valid boundary, loop condition, array index, identifier and expected output before committing to the response.
Memory anchors
Energy implication
Greater electricity demand can increase fuel use, emissions and environmental impact.
Monitor timeout
Turn off or dim an inactive display to reduce wasted energy.
Power-down setting
Automatically shut down or sleep an unused system.
Standby
A low-power state that can still consume some electricity.
User action
Power down equipment when it will not be needed.
Explain the benefit
Setting → less energy used → lower environmental impact.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Why are both address and data buses needed?
Which monitor setting can reduce energy use?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
What is Pass Harbor?
Completely free exam prep for 247 UK exams.
- Practice questions
- Flashcards
- Study guides
- Mock exams
- No registration
- No paywall
- Start instantly
“No more expensive exam prep. Quality study tools should be accessible to everyone.”