Apparatus & Techniques: Using an Optical Microscope Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists as they...
Edexcel IGCSE Maths 复习笔记 2.17.2 Inequalities on Graphs - Interpreting How do we interpret inequalities on a graph? First, see Inequalities and Straight Line Graphs Once you do… Write down...
Edexcel IGCSE Maths 复习笔记 2.17.1 Inequalities on Graphs - Drawing How do we draw inequalities on a graph? First, see Straight Line Graphs and Linear Inequalities Once you do… DRAW the line...
Edexcel IGCSE Maths 复习笔记 2.16.2 Solving Inequalities - Quadratic What is a quadratic inequality? An Inequality tells you that one expression is greater than (“>”) or less than (“<”) anoth...
Edexcel IGCSE Maths 复习笔记 2.16.1 Solving Inequalities - Linear What is a linear inequality? An Inequality tells you that one expression is greater than (“>”) or less than (“<”) another “⩾”...
Apparatus & Techniques: Dissection Dissections are a vital part of scientific research They allow for the internal structures of organs to be examined so that theories can be made about ...
Compromises between Gas Exchange & Water Loss The exchange of gases from the atmosphere is essential for the survival of organisms Oxygen is required for respiration Carbon dioxide is re...
Adaptations of Gas Exchange Surfaces Effective exchange surfaces in organisms have: A large surface area Short diffusion distance Concentration gradient (maintained) Across the Body S...
The Relationship between Surface Area: Volume Ratio & Metabolic Rate The metabolic rate of an organism is the amount of energy expended by that organism within a given period of time The...
