an instrument that uses visible light and lenses to magnify a viewed specimen

a glass or plastic disc that refracts light to increase magnification

the number of times greater in size the viewed object is compared to its actual size

pores in the leaf through which water, oxygen and carbon dioxide can diffuse

Observing the structure and distribution of stomata: practical

Combined science

Pupils will learn about ways in which the human body maintains a constant internal environment in response to internal and external change, including changes in temperature and water balance.

Pupils learned about aerobic and anaerobic cellular respiration, including the chemical reactants and products of the processes, and practical ways to measure the rate of cellular respiration in living cells.

Transport and exchange surfaces in plants

Physical activity and equipment requiring safe use

how many times larger the viewed object is than its actual size

What does the term 'magnification' mean in microscopy?

What is the purpose of using nail varnish in the stomata experiment?

Where are stomata more commonly found on a leaf?

Plants in dry environments have fewer stomata to conserve water.

Plants in dry environments have more stomata for increased gas exchange.

Stomatal density is higher in humid environments.

Stomatal density is the same regardless of environment.

How does stomatal density relate to a plant's environment?

Calculate the stomatal density if 20 stomata are found in an area of 0.1 mm².

If a plant has a stomatal density of 100 stomata per mm² and the leaf area is 10 mm², how many stomata are on the leaf?

Which process occurs in the chloroplasts of plant cells?

A light {{}} is used to magnify small objects in the lab.

Which part of the plant cell is responsible for water loss regulation?

the process of water loss through stomata

Why is it important for stomata to be able to open and close?

Which gas is released by plants during photosynthesis?

Content guidance

Risk assessment required - equipment

Adult supervision required

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