CIE IGCSE Biology: 复习笔记:1.1.4 Features of Organisms
CIE IGCSE Biology: 复习笔记:1.1.4 Features of Organisms The Five Kingdoms The first division of living things in the classification system is to put them into one of five kingdoms. They are: Anima...
CIE IGCSE Biology: 复习笔记:1.1.4 Features of Organisms The Five Kingdoms The first division of living things in the classification system is to put them into one of five kingdoms. They are: Anima...
CIE IGCSE Biology: 复习笔记:1.1.2 Concept & Uses of Classification Systems How Organisms are Classified There are millions of species of organisms on Earth A species is defined as a gro...
CIE IGCSE Biology: 复习笔记:1.1.1 Characteristics of Living Organisms Characteristics of Living Organisms Movement: an action by an organism or part of an organism causing a change of posit...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:4.5.2 Disposal of Addition Polymers Disposal of Addition Polymers Addition polymers are formed by the joining up of many small molecules wit...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:4.5.1 Addition Polymers Monomers Polymers are large molecules of high relative molecular mass and are made by linking together large numbers...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:4.4.2 Bromine & Alkenes Bromine & Alkenes Alkenes are a homologous series of hydrocarbon compounds with at least one double bond bet...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:4.3.2 Halogens & Alkanes Halogens & Alkanes In a substitution reaction, one atom is swapped with another atom Alkanes undergo a subs...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:4.3.1 Alkanes The Alkanes Alkanes are a group of saturated hydrocarbons The term saturated means that they only have single carbon-carbon bo...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记:4.2.4 Cracking Cracking Saturated molecules contain single bonds only whereas unsaturated molecules contain double bonds between their carbo...
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