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Test for protein 4 Test for lipid The emulsion test 4. Biology Experiments 2 Biology experiments Introduction. Test for glucose 3 Test for protein The biuret reaction 3. Nitrates are washed out of a soil sample and are shown to reappear after a few days, using diphenylamine sulphate as a nitrate indicator. Bulk Downloads Diffusion 6. Food tests Reagent for food tests and enzymes Reagent for food tests and enzymes 1 Test for starch Using iodine solution 1.

Water is allowed to rise up columns of sand of different particle size and the height is measured. A serial dilution of starch solution is tested with iodine 5. The fall in water level is measured with a measuring cylinder. The volume of water passing through equal depths of topsoil of varying grades is measured. These are then examined and counted under the microscope. Controls are conducted with plain lanolin, untreated cut coleoptiles and intact coleoptiles To download whole sets of experiments in zip files see the links to the right.

Biology Experiments. Educational experimental work to download by D G Mackean

Crumb structure is shown to be important. Both are then placed in warm water and the sensations compared The coarse sand and fine sand are coursewofk to settle and xoursework dried and weighed. Bulk Downloads Diffusion 6. To download whole sets of experiments in zip files see the links to the right.

A simple Tullgren funnel is used to drive arthropods from the soil. One of them contains a plant The fall in water level is measured with a measuring cylinder. The levels of liquid in each tube are observed 6.

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These experiments are available as a PDF booklet which can be opened or downloaded here: The tubes are illuminated or darkened 8. The air in the respirometer is then renewed and the rate of oxygen uptake compared Fresh and sterilized soil is scattered on to a nutrient agar in Petri dishes. The liquid which condenses is identified A control is conducted with plain lanolin The gas is collected and tested for oxygen 6.

Slaked lime is added to a clay suspension. Food tests Reagent for food tests and enzymes Reagent for food tests and enzymes 1 Test for starch Using iodine solution 1.

Iodine solution reveals clear areas of starch-agar under the fruit 6. Test for fats 5 How sensitive is the starch test?

Water is poured through equal volumes of peat and sand. Controls are conducted with plain lanolin, untreated cut coleoptiles and intact coleoptiles The proportion retained is found by weighing.

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Water is poured through equal volumes of sand, clay mixtures in funnels and the volume passing through in a given time is measured. Beneath the description of each experiment you will find links from which you can open or download the experiments in Word format, and a link from which you can download the group of documents in a zip file.

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A serial dilution of starch solution is tested with iodine 5. Nitrates are washed out of a soil sample and are shown to reappear after a few days, using diphenylamine sulphate as a nitrate indicator. The volume of water passing through equal depths of topsoil of varying grades is measured.

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Soil Experiments Back to top. The tubes are illuminated or darkened 7. Water is allowed to rise up columns of sand of different particle size and the height is measured.

Samples are taken at 2-day intervals, dried and weighed 8. Acidity or alkalinity of soil samples is compared, using BDH soil indicator. Soil is shaken with water and the particles allowed to settle.

Air from a can of soil is dislodged under water. If you do not have Microsoft Word installed you can download Word Viewer free here.

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Soil is shaken with a clay-dispersing solution.