Light Intensity Inverse Square Law - AQA GCSE Biology Calculation Practice Book

The inverse square law catches students off guard because it looks different from every other GCSE formula. This AQA GCSE Biology workbook demystifies 1/d2 with 12 scaffolded questions using the EVERY method framework.

The EVERY method breaks each calculation into clear steps: Equation, Values, Enter values into the equation, Rearrange if needed, Your units. Every question has a structured EVERY table for students to complete, building a consistent problem-solving habit. Questions get progressively harder: Q1-3 are straightforward, Q4-6 introduce unit conversions, and Q7-12 require rearranging the formula.

What's inside:

- 12 progressive questions on Light Intensity and the Inverse Square Law (light intensity is proportional to 1/d2)

- Structured EVERY method table on every question page

- Progressive difficulty: simple substitution, then unit conversions, then rearranging

- Self-assessment tracker with "What made me stuck?" reflection checklist

- Full worked answers for all 12 questions using the EVERY method steps

AQA specification reference: 4.4 Bioenergetics (Combined Science and Triple Biology)

The inverse square law describes how light intensity changes as you move a lamp closer to or further from a plant in a photosynthesis experiment. Students must square the distance, take the reciprocal, and compare values at different distances.

Common student mistakes this workbook addresses: forgetting to square the distance before taking the reciprocal, confusing "proportional to" with "equal to", stating that doubling the distance halves the light intensity (it actually quarters it), and not linking the calculation back to rate of photosynthesis.

Suitable for AQA GCSE Combined Science and Biology (Triple). Works for both foundation and higher tier students.

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