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 复习笔记：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 复习笔记：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 复习笔记：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 复习笔记：3.1.4 Practical: Investigating Temperature Changes Practical: Investigating Temperature Changes Aim: To perform a calorimetry study of the reaction...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.1.3 Energetics Calculations Calculate Heat Energy Change In order the calculate heat energy changes you need to know the mass of the subst...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：3.1.2 Calorimetry Calorimetry Calorimetry is a technique used to measure changes in enthalpy of chemical reactions There are two types of ca...
