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Year 8 Revision - By Romal Waqif (The Periodic Table and Reactivity…

- - - - Corrosion
  - - - Give me an example of a balanced chemical equation.
        
        Hydrochloric acid/HCl + Magnesium/Mg -> Magnesium chloride/MgCl + Hydrogen/H
  - - - What is it?
        
        A chemical cycle that involves limestone (CaCO3) turning into quicklime (CaO), turning into slaked lime (Ca(OH)2 (s)), turning into limewater (Ca(OH)2 (aq)).
    - - Thermal decomposition is chemical decomposition caused by heat.
- - - - Speed-Distance-Time Graphs
        
        Speed = Distance/Time
        
        Time = Distance/Speed
        
        Distance = Speed x Time
  - - - What is the gravity on earth in newtons?
        
        10 N/kg.
    - - What causes them?
        
        Days, seasons and years are caused by the Earth tilting around the Sun.
- - - - Renewable Energy
        
        Solar Power, Hydroelectric, Wind Power, Biomass, Hydrogen and Fuel Cells, Geothermal
      - Fossil Fuels
        
        Petroleum, Coal, Natural Gas
    - - Nuclear Power
- - - - What enzymes did we learn about? What do they do?
        
        Carbohydrase (breaks down carbohydrates), protease (breaks down proteins) and lipase (breaks down fats).
- - - - Vaccinations
      - Antibiotics and Resistance
- - - - Indigestion Tablets
    - - Metals Reacting with Carbonates
  - - - Catalysts
      - Collision Theory
      - Concentration
      - Surface Area
      - Temperature
  - - - Solid, liquid, gas and plasma.