Core Practical 15: Investigating Gamma Radiation Absorption Aim of the Experiment To investigate the absorption of gamma rays by different thicknesses of lead Variables: Independent variable?= Thic...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.1.1 Levels of Organisation Cells, Tissues, Organs & Organ Systems Cells are the basic building blocks of all living organisms Unicellular...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 1.2.5 Pathogens Types of Pathogen A?pathogen?is any microorganism that?causes disease?in another organism (e.g. in plants or animals) Many?micr...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 1.2.4 Prokaryotic Organisms Prokaryotes All living organisms can be grouped or ‘classified’ using a classification system that consists of?five...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 1.2.3 Eukaryotic Organisms: Fungi & Protoctists Fungi Main features of fungi: They are?usually multicellular?but some are?single-cel...
Nuclear Decay Equations Alpha Decay An alpha particle consists of?2 protons and 2 neutrons (It is emitted from large unstable nuclei) When an alpha particle is emitted from a nucleus: The nuc...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 1.2.2 Eukaryotic Organisms: Animals & Plants Animals The main features of animals: They are?multicellular Their cells contain a?nucleus?wit...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 1.2.1 Eukaryotic Organisms Common Features of Eukaryotic Organisms: Basics All living organisms can be grouped or 'classified' using a c...
Alpha, Beta & Gamma Particles Some elements have nuclei that are unstable This tends to be when the number of nucleons does not balance In order to become more stable, they emit particle...
