Grade 8 Natural Science extends the four knowledge strands with more sophisticated content. Learners study cell biology, chemical reactions and the periodic table, mechanics and waves, and Earth's place in the solar system. They are expected to plan and conduct independent investigations, interpret data critically, and write formal scientific reports. Grade 8 Natural Science directly prepares learners for Physical Sciences and Life Sciences in the FET Phase.
- Cell theory: all living things are made of cells, cells come from cells
- Animal and plant cell structure: organelles and functions — nucleus, mitochondria, chloroplast, cell wall, vacuole
- Unicellular vs multicellular organisms: examples and comparison
- Cell division: mitosis — overview, importance for growth and repair
- The circulatory system: heart structure, blood vessels, blood components and functions
- The respiratory system: organs, mechanism of breathing, gas exchange in alveoli
- Interaction between circulatory and respiratory systems
- Investigation: observe and draw cells using a microscope (or diagrams)
- The atom: protons, neutrons, electrons — atomic number, mass number
- Elements: definition, symbols, first 20 elements of the periodic table
- The periodic table: periods, groups, metals and non-metals, atomic number order
- Compounds: definition, molecular formula, name from formula
- Chemical formulae: H₂O, CO₂, NaCl, O₂ — what they mean
- Physical properties of matter: melting point, boiling point, density, solubility
- States of matter: particle model — solid, liquid, gas
- Changes of state: melting, freezing, evaporation, condensation, sublimation
- Speed: distance ÷ time — calculate and apply
- Velocity and acceleration: introduction — vector vs scalar
- Forces: revision + Newton's First and Second Laws
- Momentum: p = mv — calculate and apply
- Work: W = F × d — calculate
- Energy: gravitational potential energy (GPE) and kinetic energy (KE) — calculate
- Waves: transverse and longitudinal waves — parts, wavelength, frequency, amplitude
- The electromagnetic spectrum: uses of each region in everyday life
- Earth's place in the solar system: distances, sizes, orbital periods
- The Moon: formation theory, surface features, Apollo missions
- Tides: gravitational pull of Moon and Sun — spring and neap tides
- Eclipses: solar and lunar eclipses — conditions and explanation
- Comets, asteroids, meteors, meteorites — features and differences
- Stars: life cycle — nebula, main sequence, red giant, white dwarf, supernova, neutron star/black hole
- Galaxies: the Milky Way, types of galaxies, scale of the universe
- Space exploration: SA's role — SANSA, MeerKAT radio telescope
Learn the cell organelles and their functions. Nucleus, mitochondria, chloroplast, cell membrane, cell wall, vacuole, ribosomes — know each one's job cold.
Write chemical formulae correctly. H₂O not H2O. Subscripts matter. The formula tells you exactly how many of each atom.
Know the three mechanics formulae. Speed = d ÷ t. Momentum = m × v. Work = F × d. These appear in every Grade 8 test.
The periodic table is not optional. Learn the first 20 elements by name and symbol. Rows are periods, columns are groups.
Newton's Laws in plain English. 1st: objects stay as they are unless a force acts. 2nd: F = ma. Apply both in word problems.