English National Curriculum - Science
Mission Objectives
Define diffusion and describe how it occurs across cell membranes
Explain the effect of surface area, temperature, and concentration gradient on diffusion rate
Describe adaptations of exchange surfaces in mammals, fish, and plants that maximise the rate of diffusion
Save files related to this lesson
Words and meanings to learn
diffusion
The process by which particles spread from an area of high concentration to an area of low concentration.
particles
Small, minute pieces that make up solids, liquids, and gases.
concentration
The amount of a substance in a given volume, affecting how quickly diffusion occurs.
surface area to volume ratio
A measurement that affects how quickly substances can diffuse into cells.
net-movement
The overall direction that particles move, even though they are all moving randomly
Samantha is an accomplished science educator whose current work centres on curriculum design and professional development, supporting teachers to deliver high-quality science education through evidence-informed approaches. She is a former Head of Chemistry and Sixth Form Tutor with extensive Key Stage 4 and 5 experience, and has worked as an AQA examiner, giving her valuable insight into assessment standards and what students need to succeed.
Underpinning this is a strong foundation in applied science built across a range of industry roles. Samantha has held scientific roles at John Smith's Brewery, Yorkshire Water and WasteCare, where she led technical projects, drove operational efficiencies and ensured compliance with industry standards. Across these roles she has first-hand experience of how scientific knowledge translates into measurable outcomes in professional and commercial environments.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket.
PowerPoint slides and visual aids (particle diagrams, SA:Vol ratio tables)
Agar jelly cubes with sodium hydroxide and phenolphthalein indicator
Beakers of hydrochloric acid
Rulers, stopwatches, scalpels, tweezers
Practical worksheet with pre-filled and blank SA/Vol tables
Adaptation card sort or fact sheet on exchange surfaces (lungs, gills, leaves, intestines)
Differentiated challenge questions for stretch and application
Expert film
Mission assignment film
Address
Developing Experts Limited
Exchange Street Buildings
35-37 Exchange Street
Norwich
NR2 1DP
UK
Phone
01603 273515
Email
[email protected]
Copyright 2026 Developing Experts, All rights reserved.
Unlock expert-designed lessons, resources, and assessments tailored for educators. No credit card required.
Claim Your Free Trial →We use cookies to enhance your browsing experience and analyze our traffic. Learn more.