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How to investigate the effect of planting density on the growth of plants
We would like our GCSE students to investigate the effect of planting density on the growth of plants. It has been suggested that we could sow increasing numbers of cress seeds onto moistened filter paper in Petri dishes. How could we improve the protocol to give us good results? What are the best seeds to use?
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Water uptake in a potometer
Will a cut shoot (as is used in a potometer for measuring transpiration) take up water more quickly than a rooted plant?
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Ecology activites around a 'brown roof'
We have just had a 'brown roof' built in our new school building. It is a wild garden grown on aggregates which students and teachers have access to and can work on. I would like to build activities using the resource into the curriculum for next year. We teach KS2-KS5. Do you have any ideas for projects that would like in with OCR GCSE and OCR A-Level science?
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Demonstrating the effects of various nutrients using Lemna
I'm a secondary biology teacher in Midlothian putting together activities for the new National 3 & 4 biology courses and wondered if you had an off the shelf water culture experiment you could point me towards to demonstrate the effects of various nutrients (N, P and K in particular) missing from the culture medium? The guidance we have from SQA suggests an experiment with Lemna in water culture.
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Extracting vitamin C from peppers
We're looking for some help for extracting vit. c from peppers for an advanced higher biology project. Looking for a basic procedure if possible, we are then going to use titration to quantify how much vit. c in different colours of peppers.
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Growing Chlorella without phosphate
One of my A2 students is investigating the effect of phosphate concentration on the growth of Chlorella. She is using the medium included from the supplier which contains no phospate, and then adding varying amounts of phosphate, in the form of dihydrogen sodium phosphate (aq) The supplier has not been able to tell us why there is no phosphate in the recommended solution, and the results from the investigation indicate a reduction in growth as the concentration of phosphate increases. Have you any suggestions to help both her and our biology department?
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Investigating the use of Algae as a biofuel
Our science department would like to start a project investigating the use of Algae as a biofuel. Can you give any starting points? I think it would be interesting to grow and harvest energy from an alternative source. We have a limited budget so we would need cheap experiments!
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How can we grow plants to look at root hairs?
We are trying to grow plants to look at root hairs. We have tried growing mung bean seedlings on tissue paper for a week, but the root hairs were not very visible. Is there is a better plant that we should try?
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Growth studies and germination
Is there a plant I can use for a growth study that will show appreciable growth in two weeks from planting seeds? I would like it to grow fast enough to note differences between plants grown under different conditions every couple of days.
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Lipid vs carbohydrate utilisation in seeds
What difference would there be in the rates of utilisation of lipid food reserves in seeds (eg in an oilseed) and carbohydrate food reserves (eg in a cereal)? How would this affect the dry mass of a germinating seed?
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Light and germination
Can you help me with my experiments into the effect of different colourerd lights on the germination and growth of cress seeds?
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