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
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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.
Samantha has written the complete KS4 Science curriculum, fully aligned with the AQA GCSE Science: Trilogy specification. Covering biology, chemistry and physics, the curriculum is carefully sequenced so that students build knowledge cumulatively and see clear connections between concepts across the three sciences. Drawing on her experience as an examiner and on research into effective teaching, she has designed it to embed retrieval practice, clear explanation, worked examples and the required practicals throughout, preparing students for the demands of the GCSE exams. Grounded in the realities of the classroom, the curriculum is rigorous for students and manageable for busy teachers.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket.
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