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 復(fù)習(xí)筆記 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 復(fù)習(xí)筆記 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 復(fù)習(xí)筆記 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 復(fù)習(xí)筆記 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...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 2.15.1 Quadratic Simultaneous Equations What are quadratic simultaneous equations? When there are two unknowns (say x and y) in a problem, we need two equations to be a...
