4 FREE Spring Practicals
With spring now (hopefully!) upon us plants will be growing at their best, what better time of the year to showcase them in all their colourful, wonderful glory?
From dissecting flowers and exploring the wonder of sexual reproduction in plants to a nifty way to study photosynthesis, without the fiddly setting up of the ever more elusive elodea pond weed; through to looking at ways to study geotropism, using the clinostat, and looking at those little doorways to the leaf: the stomata, using the stomatal peel.
The Stomatal Peel
These stomata or pores, connect directly to airspaces inside the leaves and regulate the movement (diffusion) of oxygen, carbon dioide and water vapour into and out of the plant. A simple method to observe stomata involves applying nail varnish to a leaf...
Geotropism and Phototropism
Tropisms guide plant growth in response to gravity and light. Geotropism responds to gravity, phototropism to light. When investigating geotropism, the clinostat can be held horizontally, and the direction of growth can be observed.
Parts of a Flower and how to Dissect
Flower dissection is a lovely, simple practical to do. Some flowers are large enough to clearly see the different parts and are easy to manipulate, some also contain both male and female parts (lily, hibiscus, tulip).
Observing Photosynthesis In Leaf Discs
Photosynthesis is an essential process in all green plants: using chlorophyll and sunlight energy to convert carbon dioxide and water into glucose which is then stored in the leaves for the cells to use in respiration.
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