GCSE Core Biology Keywords: Suggest, Use information, Explain, Conclude, Calculate, Describe, Evaluate

GCSE Core Biology Learning Objectives: Understand what different questions are asking. Know what answers are expected by AQA. I will be successful in this lesson if I can: State what information is required to answer AQA set questions (Grade C) Explain what ‘understanding’ questions are asking for (Grade C). Identify the language sought for when answering examination questions (Grade B). Structure long answers appropriately (Grade A).

GCSE Core Biology 5 mins: On your own write down as many bits of information that you think belongs in that question. 10 mins: Swap your paper with your partner and add to their paper.

GCSE Core Biology Speak to others in the room to find the answers to the questions that you have no bits of information on. Please no more than 5mins

GCSE Core Biology Let’s review the key points for Rocks & Building All substances are made of atoms. Elements are substances that contains only 1 type of atom & symbols are used for atoms to show what happens in chemical reactions.All substances are made of atoms. Elements are substances that contains only 1 type of atom & symbols are used for atoms to show what happens in chemical reactions. Limestone is used as building material & to make quicklime, cement & glass.Limestone is used as building material & to make quicklime, cement & glass. Thermal decomposition of limestone makes quicklime & carbon dioxide.Thermal decomposition of limestone makes quicklime & carbon dioxide. The molecular formula of a substance shows the number of atoms of each element that have joined together.The molecular formula of a substance shows the number of atoms of each element that have joined together. Carbonates of metals decompose when heated to produce metal oxide & carbon dioxide.Carbonates of metals decompose when heated to produce metal oxide & carbon dioxide. In a chemical reaction the mass of the reactants is equal to the mass of the products.In a chemical reaction the mass of the reactants is equal to the mass of the products. Cement is made by heating a mixture of limestone & clay. Limewater is used as a test for carbon dioxide.Cement is made by heating a mixture of limestone & clay. Limewater is used as a test for carbon dioxide. Adding water to quicklime produces slaked lime. Mortar can be made by mixing slaked lime, sand and water.Adding water to quicklime produces slaked lime. Mortar can be made by mixing slaked lime, sand and water. Concrete is made by mixing cement with sand, stones or crushed rock & water.Concrete is made by mixing cement with sand, stones or crushed rock & water. Glass can be made by limestone, sand & sodium carbonate.Glass can be made by limestone, sand & sodium carbonate.

GCSE Core Biology ASSESSOR TIPS A symbol represents 1 atom of an element. Thermal decomposition means ‘breaking down using heat’ you need to mention ‘breaking down’ and ‘using heat’ for full marks. To access grade B & above you must be able to write balanced chemical equations. You must be able to write equations for the reactions of quicklime with water & slaked lime with carbon dioxide. Make sure you know the differences between cement, mortar and concrete.

GCSE Core Biology Let’s review the key points for Rocks & Metals An ore contains enough metal to make it worth extracting the metal. The method used to extract the metal depends of the reactivity of the metal.An ore contains enough metal to make it worth extracting the metal. The method used to extract the metal depends of the reactivity of the metal. Many metals can be extracted from their oxides by using carbon.Many metals can be extracted from their oxides by using carbon. Iron ore contains iron oxide. Iron oxide is reduced in a blast furnace using coke (carbon). The iron that is produced is hard & brittle because it contains impurities.Iron ore contains iron oxide. Iron oxide is reduced in a blast furnace using coke (carbon). The iron that is produced is hard & brittle because it contains impurities. Pure iron is a soft metal that bends easily.Pure iron is a soft metal that bends easily. Steels are alloys of iron. There are many different steels that have properties suitable for particular uses.Steels are alloys of iron. There are many different steels that have properties suitable for particular uses. A pure metal is alloyed by mixing it with other metals or elements. Alloying changes the properties of the pure metal so that it is more useful.A pure metal is alloyed by mixing it with other metals or elements. Alloying changes the properties of the pure metal so that it is more useful. Smart alloys have special properties such as returning to their original shape.Smart alloys have special properties such as returning to their original shape. Transition metals have many similar properties that make them very useful.Transition metals have many similar properties that make them very useful. Copper is a very good conductor of heat & electricity & does not corrode easily. Extracting copper by traditional methods is expensive & affects the environment.Copper is a very good conductor of heat & electricity & does not corrode easily. Extracting copper by traditional methods is expensive & affects the environment. Aluminium & titanium have low densities compared to other metals, they also resist corrosion, & titanium is strong at high temperatures.Aluminium & titanium have low densities compared to other metals, they also resist corrosion, & titanium is strong at high temperatures. Extracting these metals is expensive because it involves electrolysis & high temperatures. Recycling saves resources & energy needed to extract the metal from its ore.Extracting these metals is expensive because it involves electrolysis & high temperatures. Recycling saves resources & energy needed to extract the metal from its ore.

GCSE Core Biology ASSESSOR TIPS You do not need to remember the technical details of the blast furnace. Make sure you know the 3 main types of steel (low alloy, high alloy & carbon) & what they contain. When asked for properties of alloys, many students include cost or cheapness but this is not a property of the substance and will not be awarded any marks. You must know the similarities & differences between titanium & aluminium. Aluminium is a reactive metal near the top of the reactivity series, however, it is protected by a tough layer of oxide on its surface.

GCSE Core Biology Learning Objectives: Understand what different questions are asking. Know what answers are expected by AQA. I will be successful in this lesson if I can: State what information is required to answer AQA set questions (Grade C) Explain what ‘understanding’ questions are asking for (Grade C). Identify the language sought for when answering examination questions (Grade B). Structure long answers appropriately (Grade A).