The Energy Mix Lab

What powers the country?

The energy mix is the combination of sources a country uses for its power. Split them two ways: non-renewable fossil fuels (coal, oil, gas) and nuclear, which will run out or add carbon, and renewable sources (wind, solar, hydro) that refill naturally. No source is perfect. Choosing a mix means weighing cost, reliability, environmental impact and energy security. This lab explores how the mix has changed and how to judge those trade-offs. (Percentages here are approximate - real figures shift every year.)

Energy mix words

Four terms unlock almost every energy question.

Match each source to what it is

Spot the renewable

Which of these energy sources is renewable?

• Solar power
• Coal
• Natural gas
• Oil

The UK mix has changed

A century ago the UK ran almost entirely on coal. Since then the mix has shifted a lot: - Coal has fallen sharply and is now almost phased out for electricity.\n- Gas grew rapidly in the 1990s (the "dash for gas").\n- Renewables (especially wind) have risen fast since around 2010. The drivers: dwindling coal reserves, climate targets to cut carbon, and a push for energy security. Next you will plot part of that renewables trend.

Plot the renewables trend

Renewables' approximate share of UK electricity has risen. The points (2010, 10) and (2015, 25) are already plotted - the x-axis is the year, the y-axis is the approximate percentage. Continuing the rising trend, plot the approximate 2020 value of 40%.

Read the trend

What does that rising line best show about the UK energy mix?

• The share of electricity from renewables has grown sharply since 2010
• Renewables have fallen out of use since 2010
• Coal now provides most UK electricity
• The energy mix has stayed exactly the same

Weighing the trade-offs

There is no free lunch in energy. Each type wins on some measures and loses on others - grade-9 answers weigh both sides rather than declaring one simply "best".

Why go renewable?

Select the TWO genuine advantages of renewable energy.

• They produce very low carbon emissions
• They will not run out
• They always generate power regardless of the weather
• They are always the cheapest option to build

Match each stakeholder to its view

Order the UK transition

Put these stages of the UK electricity mix into the order they happened over the last century.

• Early 1900s: coal dominates electricity generation
• 1990s: gas grows quickly in the "dash for gas"
• 2010s: wind and other renewables expand rapidly
• 2020s: coal is almost completely phased out

Choose an energy strategy

Three energy decisions. Weigh the trade-offs and pick the strongest choice.

• An emerging country has large fast-flowing rivers and wants low-carbon, reliable electricity. What suits it best?
• A developed country wants stronger energy security so it is not dependent on imported fuel. What helps most?
• Residents object to a proposed nearby wind farm, but the country has climate targets to meet. What is the best response?

Evaluate the shift

Two countries manage energy sustainably in different ways: Germany, a developed country, drives its "Energiewende" transition towards wind and solar, while Costa Rica, an emerging/developing country, generates almost all of its electricity from renewables, mainly hydroelectric power. Using these examples, evaluate whether shifting from non-renewable to renewable energy is worthwhile.

• Give one clear benefit of the renewable shift (e.g. lower carbon, better long-term energy security)
• Give one genuine drawback or challenge (e.g. intermittency, high build cost)
• Refer to BOTH named countries and how their situations differ (resources, wealth)
• Reach a justified overall judgement weighing the trade-offs

Weigh it, do not pick a side

Weak energy answers pick a side: "renewables are good, fossil fuels are bad." The best answers weigh genuine trade-offs - cost, reliability, environmental impact and energy security - and accept that the right mix depends on a country's rivers, wealth, climate and existing infrastructure. Anchor that judgement in the named contrast: Germany's Energiewende shows a wealthy developed nation deliberately rebuilding its mix, while Costa Rica shows an emerging country using its geography (rivers for hydro) to run on renewables. Reference specifics like these, not vague generalisations, and you turn a description into an evaluation.