Edexcel IGCSE Maths复习笔记 1.4.1 Roots & Indices - Basics
What are indices? An Index (plural = indices) is just a power that a number (called the base) is raised to: Laws of indices – what you need to know There are lots of very important laws (or ...
AQA A Level Biology复习笔记2.2.1 Methods of studying cells
The Principles & Limitations of Microscopy Microscopes can be used to analyse cell components and observe organelles Magnification and resolution are two scientific terms that are very importan...
AQA A Level Biology复习笔记2.1.1 The Cell Theory
The Cell Theory Until microscopes became powerful enough to view individual cells, no-one knew for certain what living organisms were made from A scientist called Robert Hooke is thought to be the ...
Edexcel IGCSE Maths复习笔记 1.3.2 HCFs & LCMs
Edexcel IGCSE Maths复习笔记 1.3.2 HCFs & LCMs What are Factors & Multiples? Factors are numbers (or expressions) which divide into another number exactly e.g. 3 is a factor of 18 as
AQA A Level Biology复习笔记1.6.1 The Structure of ATP
The Structure of ATP All organisms require a constant supply of energy to maintain their cells and stay alive This energy is required: In anabolic reactions – building larger molecules from ...
AQA A Level Biology复习笔记1.5.1 The Function of DNA & RNA
The Function of DNA & RNA Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) are both types of nucleic acid DNA and RNA are both found in all living cells DNA and RNA are both needed to bui...
Edexcel IGCSE Maths复习笔记 1.3.1 Prime Factors
Edexcel IGCSE Maths复习笔记 1.3.1 Prime Factors What are prime factors? Factors are things that are multiplied together Prime numbers are numbers which can only be divided by themselves and 1 The p...
AQA A LEVEL BIOLOGY复习笔记1.4.1 Many Proteins are Enzymes
Enzymes as Proteins Enzymes are biological catalysts ‘Biological’ because they function in living systems ‘Catalysts’ because they speed up the rate of chemical reactions without being used up or c...
Edexcel IGCSE Maths复习笔记1.2.1 Recurring Decimals
Edexcel IGCSE Maths复习笔记1.2.1 Recurring Decimals What are recurring decimals? A rational number is any number that can be written as an integer (whole number) divided by another integer When you...
