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ZIMSEC · Form 3 · Syllabus 4003

Combined Science

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  1. Transport and respiration The heart pumps blood around the body through blood vessels. Notes 1 PDF
  1. Reproduction, growth and health Reproduction in flowering plants The stamen (anther and filament) makes pollen, the male gamete.The carpel (stigma, style and… Notes 1 PDF
  1. Ecosystems and the environment An ecosystem is a community of living things interacting with each other and with their non-living environment. Notes 1 PDF
  1. Atomic structure and the periodic table An atom has a tiny central nucleus containing protons (charge +1, mass 1) and neutrons (charge 0, mass 1). Electrons (charge −1, almost no mass) move around the nucleus in shells. Notes 1 PDF
  1. Acids, bases and salts acid + base → salt + water Notes 1 PDF
  2. Metals, non-metals and chemical reactions From most to least reactive: potassium, sodium, calcium, magnesium, aluminium, (carbon), zinc, iron, lead, (hydrogen), copper, silver, gold. Notes 1 PDF
  1. Measurement, forces and motion Length – metre (m); mass – kilogram (kg); time – second (s); temperature – kelvin (K) or °C; current – ampere (A). Notes 1 PDF
  1. Energy, work, power and machines Kinetic, potential (gravitational and elastic), chemical, heat, light, sound, electrical and nuclear. Energy cannot be created or destroyed, only changed from one form to another (conservation of energy). Notes 1 PDF
  1. Electricity and magnetism Use fuses and circuit breakers, earth wires on metal appliances, and never touch switches with wet hands. Don't overload sockets. Notes 1 PDF
  1. Heat, light and waves Uses: a vacuum flask reduces all three; houses are painted white to stay cool. Notes 1 PDF