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 a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders.
Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.
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