Year 10 Science · AC9S10U04

Earth’s Energy Balance and Global Climate Change

Climate emerges from energy transfer among atmosphere, hydrosphere, geosphere and biosphere. Changes to incoming, reflected, absorbed and outgoing energy alter long-term…

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Learning goalsSay it simply

Energy flows among Earth’s spheres; changes to the energy balance help explain long-term climate patterns.

By the end of this lesson, you should be able to:

  • Climate is driven by energy transfer among the atmosphere, hydrosphere, biosphere and geosphere.
  • Multiple long-term indicators show climate patterns and change.
  • Models support predictions but include uncertainty and assumptions.
Key conceptTeach from the board

Learning sequence: Set the system boundary → Trace energy flows → Connect spheres → Test a changed balance

Core teaching

  • Climate is driven by energy transfer among the atmosphere, hydrosphere, biosphere and geosphere.
  • Multiple long-term indicators show climate patterns and change.
  • Models support predictions but include uncertainty and assumptions.

Key vocabulary and ideas

  • incoming solar radiation
  • reflection and absorption
  • infrared emission
  • greenhouse effect
  • climate evidence and response
Worked examplesWe do

Worked examples

AC9S10U04 - Earth’s Energy Balance and Global Climate Change
Example 1

Worked reasoning model Earth absorbs incoming solar energy and emits infrared energy. Increasing greenhouse-gas concentration reduces the rate at which some outgoing infrared energy escapes. An energy imbalance causes warming until flows move toward a new balance.

Example 2

Earth absorbs incoming solar energy and emits infrared energy.

Example 3

Increasing greenhouse-gas concentration reduces the rate at which some outgoing infrared energy escapes.

Example 4

An energy imbalance causes warming until flows move toward a new balance.

Curriculum examplesCopied content

Australian Curriculum v9.0 — AC9S10U04: use models of energy flow between the geosphere, biosphere, hydrosphere and atmosphere to explain patterns of global climate change

Victoria — VC2S10U11, Levels 9–10: Levels 9–10 global climate change, greenhouse gases, energy exchanges and mitigation. Victorian Science is banded across Levels 9 and 10, so the VC2S10 code identifies the band rather than a single school year.

NSW: Stage 5 Environmental sustainability and Energy provide strong supporting alignment for human impacts, energy choices and sustainability (SC5-ENV-01, SC5-EGY-01). Where NSW places the closest concept in another Stage or spreads it across focus areas, this page states that relationship rather than claiming a false one-to-one Year 10 equivalent.

Lesson componentAustralian CurriculumVictoriaNSW
Concept teaching + examplesAC9S10U04VC2S10U11SC5-ENV-01, SC5-EGY-01
Practice + reasoningApplies the descriptor through explanation, evidence and transferLevels 9–10 achievement-standard depthStage 5/related Working scientifically expectations where applicable
Assessment + masteryChecks knowledge plus evidence-based applicationChecks band-level understandingChecks relevant NSW outcome intent without forcing equivalence
Questions and answersWith answers
What is the central idea?
Energy flows among Earth’s spheres; changes to the energy balance help explain long-term climate patterns.
What should a strong response do?
Use the sequence Set the system boundary → Trace energy flows → Connect spheres → Test a changed balance. Connect the evidence, mechanism or data to the claim.
What common trap should I avoid?
The greenhouse effect is a physical layer trapping heat: Trace absorption and re-emission of infrared energy by atmospheric gases.
Practice and reviewReady for practice
  • The greenhouse effect is a physical layer trapping heat: Trace absorption and re-emission of infrared energy by atmospheric gases.
  • One weather event proves or disproves climate change: Use long-term patterns across multiple indicators and data sets.

Keep the Year 10 boundary: Do not confuse weather with climate. Do not omit natural drivers or misrepresent them as explaining the full recent trend.

  1. Use an energy-balance explanation to show how an increase in greenhouse-gas concentration can change Earth’s climate system.
  2. A graph shows atmospheric carbon dioxide and global mean temperature both increasing. Explain why the graph is important evidence but is not, by itself, the complete causal explanation.
  3. Evaluate a proposed climate response by linking the action to greenhouse-gas emissions, energy flow or another relevant Earth-system mechanism.

Review hint: Use precise scientific vocabulary, show the relevant mechanism or evidence, and state any limitation or uncertainty when the evidence does not justify a stronger claim.

Curriculum alignmentStart here

Energy flows among Earth’s spheres; changes to the energy balance help explain long-term climate patterns.

By the end of this lesson, you should be able to:

  • Climate is driven by energy transfer among the atmosphere, hydrosphere, biosphere and geosphere.
  • Multiple long-term indicators show climate patterns and change.
  • Models support predictions but include uncertainty and assumptions.
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