There are 9 required practical's for Biology:

• Microscopy - Use a light microscope to observe, draw and label biological specimens.

• Osmosis - Investigate the effect of a range of concentrations of salt or sugar solutions on the mass of plant tissue.

• Enzymes - Investigate the effect of pH on the rate of reaction of amylase enzyme.

• Food tests - Use qualitative reagents to test for a range of carbohydrates, lipids and proteins. To include: Benedict’s test for sugars, iodine test for starch and Biuret reagent for protein.

• Photosynthesis - Investigate the effect of light intensity on the rate of photosynthesis using an aquatic organism such as pondweed.

• Reaction time - Plan and carry out an investigation into the effect of a factor on human reaction time.

• Field investigations - Measure the population size of a common species in a habitat. Use sampling techniques to investigate the effect of a factor on the distribution of this species.

The following 2 practical's are for Separate Biology only:

• Plant responses (Biol only) Investigate the effect of light or gravity on the growth of newly germinated seedlings

• Decay (Biol only) Investigate the effect of temperature on the rate of decay of fresh milk by measuring pH change. 

Watch the following videos and after each one summarise what you have revised by completing the following document: