EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復(fù)習(xí)筆記：4.2.2 Combustion Fuels & Combustion The combustion of fossil fuels is the major source of atmospheric pollution Fossil fuels include:?co...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復(fù)習(xí)筆記：4.1.3 Classifying Organic Reactions Classifying Organic Reactions The reactions of organic compounds can be classified into?substitution,?ad...
Phytochrome Flowering in plants is controlled by the?stimulus?of night length Nights are shorter during the spring and summer and longer in the autumn and winter Some plants flower when nights are ...
The Effects of IAA Just like animals, the survival of plants is dependent on their ability to?respond to changes?in their environment; this?maximises their survival chances?e.g. Growing towards lig...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復(fù)習(xí)筆記：4.1.1 Organic Compounds Representing Organic Compounds Introduction Organic Chemistry is the scientific study of the structure, properties, ...
Detection of Light The eye is a?sense organ?containing receptors sensitive to light intensity and wavelength Receptors?are specialised cells that can generate an electrical impulse in a sensory neu...
Synapses: Structure & Function Structures known as?synapses?are found at the?junctions between cells in the nervous system?e.g. In the sense organs there are synapses between?sensory receptor c...
Transmission of Nerve Impulses Neurones?transmit?electrical impulses?which travel along the neurone?cell surface membrane?from one end of a neurone to the other Note that an impulse is?not?an elect...
3.2.5 Practical: Effect of Catalysts on Rate of Reaction Practical: Effect of Catalysts on Rate of Reaction Aim: To investigate the effect of different solids on the catalytic decomposition ...
