Co-ordination of Response Organisms must?respond to changes?in their?external?and?internal?environments in order to survive Organisms need to Find favourable external conditions e.g. avoiding locat...
Modern Medicine & Participation in Sports Keyhole surgery Sports injuries?are a common occurrence since the body is placed?under stress?when participating in sporting activities Some of these i...
Intensity of Exercise Effects of too little exercise on health Exercise is an important part of a?healthy lifestyle Not doing enough exercise can have a detrimental effect on the health of an indiv...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：3.2.3 Catalysts Catalysts & Rates Catalysts are substances which?speed up?the?rate?of a reaction without themselves being?altered?or?con...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：3.2.2 Explaining Rates Explaining Rates Increasing the number of successful collisions means that a greater proportion of reactant particles...
Practical: Investigating the Effects of Exercise Measuring breathing There are?four?main ways that breathing can be?scientifically measured. These include: Tidal volume?- this is the?volume of air ...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：3.2.1 Measuring Rates Measuring Rates You should be able to describe experiments to investigate the effect of surface area, concentration, t...
Variations in Breathing Rate & Heart Rate During exercise,?muscle contraction?occurs?more frequently, requiring?more energy The?rate of?aerobic respiration?increases?to meet the increase in ene...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：3.1.4 Practical: Investigating Temperature Changes Practical: Investigating Temperature Changes Aim: To perform a calorimetry study of the reaction...
