Question | Answer |
Why are alloys harder? | Their layers are harder to slide around, unlike metal elements. |
What is the equation for neutralisation? | acid+base->salt+water |
Name the three types of salt. | Nitrate, Sulphide, Chlorine |
Give an example of a sedimentary rock | limestone, sandstone |
How is igneous rock formed? | The magma enters the surface and cools down. |
How is sedimentary rock formed? | weathering, erosion and deposition to the ocean layers. compacted and cemented. |
what is sustainability? | a process that can go on forever. |
What are bases? | Compounds that dissolve in water into alkali. |
hydrochloric acid+ potassium hydroxide-> | potassium chloride+ water |
How can you check neutralisation? | With pH paper or universal indicator. |
metal carbonate+ acid-> | salt+carbon dioxide+ water |
what is brass? | an alloy, its a mixture of copper and zinc, stronger, used in decoration that need heavy forces |
how can you form copper sulphate? | extract copper from copper ores. react it with oxygen. copper oxide is formed. mix it with sulphuric acid. filter it. |
how can you tell if a salt is chloride? | it uses hydrochloric acid. |
stone is strong under... | compression (squashing forces) |
stone isn't strong under... | tension (pulling forces) |
what does porous mean? | it has holes that allow water to go into it. |
list the properties of metamorphic rocks. | not porous. therefore, hard to cut. not resistant to chemical weathering when there is calcium carbonate. |
list the properties of igneous rocks. | hard to cut, not porous, no calcium carbonate. |
what is solder? | an alloy made of lead and tin. soft, malleable, low melting point, used to join metal pipes. |