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Criado por luucymarieee
mais de 9 anos atrás
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Questão | Responda |
What do plate movements cause? | Earthquakes and volcanoes |
What process is rock recycled by? | Geological process |
Why is the plate tectonic theory widely accepted now? | Evidence has been repeated and agreed |
Why do scientist study volcanoes? | To try and predict future eruptions and seismic activity |
What are rods used for? | Building materials |
What makes an alloy? | At least one metal, but have different properties |
How is copper extracted? | By reduction |
How is copper purified? | By electrolysis |
What can reinforce concrete? | Steel rods |
What makes iron rust? | Contact with water and oxygen |
What can speed up the rusting of iron? | Salt |
Where are metals extracted from? | Rocks |
Does aluminium have a high or low density? | Low density |
Why doesn't aluminium corrode? | It has a layer of protective oxide layer |
What is the equation for the haber process? | N2+3H2<>2NH3 |
What is ammonia used for? | Nitrogen fertilisers |
What can fertilisers cause? | Eutrophication |
What is the word equation for a neutralisation reaction? | Acid + base -> salt + water |
What does acid react with to make salts? | Metal oxides and hydroxides, and metal carbonates |
What is electrolysis used to split sodium chloride into? | Hydrogen, chlorine and sodium hydroxide |
In electrolysis where do the positive ions move? | They move to the cathode |
In electrolysis where do the negative ions move? | They move to the anode |
How is sodium chloride mined? | From the ground or by solution mining |
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