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Showing results 1 to 10 of 98
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Members only resource
PP162 – Comparing the density of stomata in common plants and those adapted to dry conditions
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This method compares the density of stomata of mesophytes (most land plants) to xerophytes (adapted to dry conditions) through making leaf impressions.
words matched: density, Stomata
Members only resource
GL508 – Observing stomata
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This guide outlines both how to observe stomata using three different methods including direct viewing, epidermal peel, and making a leaf impression. The second half the guide demonstrates how to open.. more
words matched: density, Stomata
Members only resource
GL363 - Activities using plants
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Covers the fundamental activities that use plants, and includes advice on which plants to use and how to keep plants at school. 
words matched: density, Stomata
Members only resource
Bulletin 152 - Spring 2015
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The Directors update on a range of issues including Cat 5 taps and WRAS regulations, CLEAPSS 2015 Technician Training Programme, information on genetic modfication of bacteria, genetic analysis of .. more
words matched: density, Stomata
Members only resource
Bulletin 184 - Autumn 2025
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Welcome back to a new year, in this terms bulletin :-- Directors editorial- Welcome to new staff- Log in updates- The world of blob- Hazcard updates- International microscale symposium- 2026 MiSAC Com.. more
words matched: density, Stomata
Members only resource
GL352 - Managing practical work in non-lab environments (COVID-19 pandemic)
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The CLEAPSS Helpline receives a number of calls about the teaching of science practical work in non-lab environments. In the normal running of a school we advise against doing this due to additional r.. more
words matched: density, Stomata
Members only resource
PP161 - Comparing the distribution of stomata on the surface of leaves
Click to download Document.
This practical procedure offers an entry-level activity comparing the number of stomata found on the upper and lower surfaces of leaves of Tradescantia zebrina.
words matched: Stomata
Members only resource
PP154 - Using Hope’s apparatus to investigate water density
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This activity is designed to demonstrate that water reaches its maximum density at 4°C. This unusual behaviour  relates to hydrogen bonding and explains why ponds freeze from the surface down and not .. more
words matched: density
Members only resource
PP123 - Serial dilutions for calculating population density of microbes
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A straight forward method of how to serially dilute a bacterial broth, and grow colonies, for calculating population density. 
words matched: density
Members only resource
Bulletin 102 - summer 1998
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This edition includes notes on fume cupboard testing, working safely with wood dusts, not using mains-powered open wire radiant heaters, dissecting butchers' bits, an introduction to microscale chemis.. more
words matched: density
Showing results 1 to 10 of 98
1 234►