Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.4.4 Practical: Osmosis Practical: Factors that Influence Osmosis Osmosis is the diffusion of water molecules from a?dilute solution?(high con...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.4.3 Osmosis Osmosis Theory All cells are surrounded by a cell membrane which is?partially permeable Water?can move in and out of cells by osm...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.4.2 Practical: Diffusion Practical: Factors that Influence Diffusion Diffusion is the?movement of molecules?from a region of?higher?concentra...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.4.1 Diffusion Diffusion Theory Diffusion is the?movement of molecules?from a region of its?higher?concentration?to a region of its?lower?conc...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.4 Practical: Enzymes & Temperature Practical: Enzymes & Temperature Amylase is an enzyme that digests?starch?(a polysaccharide of g...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.3 Enzymes Enzymes as Biological Catalysts Enzymes Enzymes are proteins that act as?biological catalysts?to?speed up?the rate of a chemical ...
Activity & The Decay Constant Since radioactive decay is?spontaneous?and?random, it is useful to consider the average number of nuclei which are expected to decay per unit time This is known as...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.2 Practical: Food Tests Practical: Food Tests Preparing a sample Before you can carry out any of the food tests described below, you may ne...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.1 Carbohydrates, Fats & Proteins Chemical Elements Most of the molecules in living organisms fall into three categories:?carbohydrates,...
