Science at key stage 3    (Year 7)

• identify some acids, eg vinegar, lemon juice
• identify some everyday uses of acids, eg in foods, medicines, cleaning materials

• identify hazard symbols for harmful, irritant and corrosive substances
• describe how to work safely with acids and alkalis and what to do if a spill occurs
• explain that if water is added to an acid or alkali it dilutes it and the solution becomes less hazardous

• present their results in a way which helps them identify patterns
• recognise that solutions of dyes which show one colour in acids and another in alkalis are called indicators
• recall the names of some common laboratory acids and alkalis
• use their record of results to identify which solutions are acidic and which are alkaline

• identify the pH of a given solution from an appropriate colour chart
• classify the solution as strongly or weakly acidic or alkaline, or neutral
• relate their classification to the use of the acid or alkali and associated hazards

• identify uses of acids and alkalis and the benefits and potential hazards of these
• communicate clearly key points about a particular use of acids or alkalis

• describe that when an acid is added to an alkali, the pH of the mixture falls and vice versa
• explain how to obtain a neutral solution
• find information in reference books, on CD-ROMs, or from databases

• identify key questions about acids and alkalis
• use correct scientific terminology in answering questions

• decide on a suitable question to investigate and suitable techniques for doing so
• summarise what they have found out
• demonstrate understanding of the strength of evidence through the questions they ask
• use the evidence collected to evaluate an indigestion remedy

• identify relationships between key ideas
• explain why connections were made