Evan Murphy

Room to explore. Space to get it wrong. Time to understand. Free interactive science practice for IGCSE and A-level, with exam tips. Made by a Head of Science.

[Evan Murphy @scholarlabedu]

Question of the day: Explain why enzyme activity falls above the optimum temperature.

Swipe for the answer.

Tip: Never write that an enzyme is "killed". Say denatured, then explain it: the active site changes shape, so the substrate no longer fits.

https://t.co/SvqHfoUUS5

[Evan Murphy @scholarlabedu]

Chemistry and Physics Unit 1 are next week. Read the command word first.

Describe: what happens
Explain: why it happens
Calculate: show working + units
Evaluate: weigh up, then judge

Practise in the Logic Lab: https://t.co/SvqHfoUUS5

#IGCSE #Chemistry

[Access Tuition @Access_Tuition]

If you're marking your own paper, read the 'allow' and 'do not accept' notes in the mark scheme, not just the answers. A lot of 'close enough' answers don't survive them. #GCSE #ALevel
https://t.co/UI2zEqKTdP

[Evan Murphy @scholarlabedu]

@STEMLearning_IN A quick exam prompt: compare incoming and scattered light, then ask what the energy shift reveals about the material.

[Evan Murphy @scholarlabedu]

@SN_Explores Great example of emergence. A quick class model with simple rules can show how local interactions create coordinated group behaviour.

[Evan Murphy @scholarlabedu]

@PhETsims Prediction first works beautifully here: ask students where the next energy level should appear before changing the system.

[Evan Murphy @scholarlabedu]

@OrigamiCells A nice way to connect rate and scale: ask students to estimate how many amino acids a bacterial ribosome adds in ten seconds.

[Evan Murphy @scholarlabedu]

@Hookean1 Static can feel abstract; sketching charge transfer before using the app helps students explain why objects attract or repel.

[Evan Murphy @scholarlabedu]

Two genetically identical cells from one. Here's how.

Our 35-second walkthrough follows prophase, metaphase, anaphase and telophase, then cytokinesis.

https://t.co/SvqHfoUUS5

#Biology #IGCSE #ALevelBiology

[Evan Murphy @scholarlabedu]

Re-reading feels productive. Recall is what makes it stick.

ScholarLab has 2,800+ free IGCSE Biology recall questions. Answer from memory, reveal, rate yourself R/A/G.

Exam tip: re-test your reds tomorrow, not tonight.

https://t.co/SvqHfoUn2x

#Biology #ExamPrep #StudyTips

[Evan Murphy @scholarlabedu]

@PhETsims Free sims that teachers can use straight away are gold. Predict, test, then explain is such a strong lesson loop.

[Evan Murphy @scholarlabedu]

@OrigamiCells Great detail on the heart. A tip: get students to trace blood from vena cava to aorta before naming the chambers.

[Evan Murphy @scholarlabedu]

@SN_Explores Microbes as climate allies is a great classroom hook. Ask students which processes bacteria help with in the carbon cycle.

[Evan Murphy @scholarlabedu]

@STEMLearning_IN Lovely to see another Mini Science Centre open. Hands-on kit turns abstract ideas into something students can touch.

[Evan Murphy @scholarlabedu]

@OrigamiCells Bones models make structure stick. A quick check: which tissue makes bone hard, and which makes it flexible?

[Evan Murphy @scholarlabedu]

@Hookean1 Circular motion trips students up. Ask them to sketch the force towards the centre before they use the formula.

[Evan Murphy @scholarlabedu]

Why do red blood cells burst in pure water?

See osmosis in isotonic, hypotonic and hypertonic solutions, and why animal cells cannot resist it.

https://t.co/SvqHfoUUS5

#Biology #IGCSE #ALevelBiology

[Evan Murphy @scholarlabedu]

@SN_Explores Lovely one for biology classes. Sunflower seed spirals are a great real example for students to spot and count.

[Evan Murphy @scholarlabedu]

@SN_Explores Fun fact to pair with this: python hearts grow noticeably after a big meal. Nature adapts brilliantly.

[Evan Murphy @scholarlabedu]

@STEMLearning_IN @SBI_FOUNDATION Hands-on models make cells memorable. Fun fact: one human cell holds about two metres of DNA.