English National Curriculum - Science
Mission Objectives
Describe the process of transpiration and how guard cells help minimise it
Compare the number of stomata on the upper and lower surface of the leaf
Explain how factors such as wind, humidity, light intensity and temperature affect transpiration
Save files related to this lesson
Words and meanings to learn
transpiration stream
the movement of water from the roots, through the stem and out through the leaves.
xylem
a type of plant tissue which transports water and mineral ions around the plant. These cells are dead cells which do not lose structure when water is added to them.
phloem
a type of plant tissue which transports dissolved sugars around the plant. These cells are living cells.
stomata
the holes in the leaf surface, which allow water to exit the leaf and gases to exchange.
guard cells
cells which ‘guard’ the stomata, they can open and close the stoma by increasing their water content to make them turgid and swell, closing the stomata.
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.
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.