End-of-Year Revision


SORTING OUT THE MIX-UPS

Kinds of substances  - pure substances/mixtures, elements/compounds and examples of each;
Methods of separation -
filtering (filtration);
decanting,
distilling (distillation);
evaporating (evaporation);
crystallising (crystallisation);
condensing (condensation);
centrifuging;
magnetic separation;
Properties used in each separation method (eg. particles size, boiling point, density);
Solutions (solutes, solvents) and their uses;
Suspensions (eg. clay in the water from Malpas Dam);
Water treatment (methods used to remove particles, kill germs, destroy odours);

ASTRONOMY
The Sun and planets;
the order of distance from the Sun;
their motions (rotation and revolution);
their main characteristics (rocky, gas giants satellites, rings);
their relative sizes (especially Sun, Moon, Jupiter and Earth);
Geocentric and heliocentric models of the solar system.
Differences between planets and stars;
The motions of Earth and their effects (days, months, years, seasons);
Earth’s atmosphere (main gases and their approximate concentration);
Current missions to explore the solar system.





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