Cracking Hydrocarbons — Interactive Lesson (Ages 14–16)

Too much heavy fuel oil and not enough petrol? Cracking is the chemist's answer. This 21-slide interactive lesson on cracking hydrocarbons takes pupils from first ideas to exam-style explanations, with 12 self-marking activities and nothing to prepare beforehand.

Teaching Cracking Hydrocarbons in GCSE Chemistry

Pupils define cracking as thermal decomposition, compare catalytic cracking over a hot zeolite or aluminium oxide catalyst with steam cracking, and use supply-and-demand data to decide which fractions a refinery should crack. Several activities practise balancing cracking equations by subtracting carbons and hydrogens, and pupils identify the shorter alkanes and alkenes produced and what each is used for.

What Pupils Will Learn

• Define cracking as a thermal decomposition reaction.
• Describe catalytic cracking and steam cracking.
• Explain why cracking is needed, using supply and demand data.
• Balance equations for cracking reactions.
• State the uses of the products of cracking.

What’s Included

• 21-slide interactive lesson on cracking hydrocarbons
• 12 self-marking activities: multiple-choice questions, true-or-false checks, sorting tasks, drag-and-drop categorising and fill-in-the-gap questions
• Step-by-step teaching cards that reveal one point at a time
• A written explanation task with a model answer for self-assessment

Why Teachers Love It

• No prep — open it on an interactive whiteboard, laptop or tablet
• Instant feedback explains every answer, right or wrong
• Examples from both Nigeria and the UK make the chemistry feel real
• Works for whole-class teaching, independent study or revision

Curriculum Alignment

Supports the organic chemistry content of UK GCSE Chemistry (AQA, Edexcel and OCR) and the Nigerian Senior Secondary Chemistry curriculum (SS2–SS3), including WAEC and NECO exam preparation.

Love this? You’ll love…

• Crude Oil and Fractional Distillation — Interactive Lesson (Ages 14–16)
• Alkenes and the Bromine Water Test — Interactive Lesson (Ages 14–16)

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FAQ

What year groups is this for? Years 10–11 (ages 14–16), and SS2–SS3 in Nigeria.

Is it self-marking? Yes — all 12 activities give instant feedback.

Do pupils need to log in? No. The lesson runs in any modern web browser.

Can I use it for revision? Yes. Pupils can replay it as often as they like, and the results screen shows which questions to review before a test.