Chelmsford County High School for Girls

Subjects

Chemistry - KS3 Resources

Key Stage 3 Chemistry is divided into a number of topics which span Years 7 - 9. The emphasis is on scientific enquiry, such as scientific evidence and investigative skills, as well as knowledge, skills and understanding.

The topics studied are:

• Introduction to Chemistry
• Water
• Materials
• Acids & Alkalis
• Elements, Compounds & Mixtures
• Air
• Weathering & Rocks
• Electrochemistry
• Metals
• Kinetic Theory
• Periodic Table
• New Materials from Natural Products

Study aids

• Balancing equations
• Oxidation (Flash file)
• Chemical definitions (Flash file)

Rocks

As part of the Key Stage 3 National Curriculum for Science, students need to know about geological changes:

• how forces generated by expansion, contraction and the freezing of water can lead to the physical weathering of rocks
• about the formation of rocks by processes that take place over different timescales, and that the mode of formation determines their texture and the minerals they contain
• how igneous rocks are formed by the cooling of magma, sedimentary rocks by processes including the deposition of rock fragments or organic material, or as a result of evaporation, and metamorphic rocks by the action of heat and pressure on existing rocks.

• Weathering & rocks (Flash file)
• Sedimentary rocks (Flash file)
• Igneous rocks (Flash file)
• Metamorphic rocks (Flash file)
• The rock cycle

Educational content by C. Watkinson

Illustration & animation by A.Hayler