Chemical Reaction 7F
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 1.What is Chemical Reaction? | Chemical Reaction is in which new substances are made.
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| 2.What happens when a firework goes off? | When a fireowok goes off, you can not colllect all the gases and smoke that are produced and turn them back into a firework.
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| 3.If there is a physical change, are theire any new substances formed? | No, no new substances are formed.
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| 4.What is the definition of permanent or irreversible? | The definition is that new substances are formed during a chemical reaction.
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| 5.Can acids be corrosive? | Yes of course they can be corrosive.
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| 6.What is called iron and sulpuhric acid? | Iron and sulphuric acid are called reactants.
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| 7.Why is carbon dioxide called dry ice? | Because to make carbon dioxide is you have to cool it down to about -80C, when it warms up again it turns straight from a solid to a gas without melting first.
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| 8.What will happen if carbon dioxide and limestone mix together? | When they mix together it will go milky.
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| 9.Name the gas off when acids react with limestone. | Carbon dioxide.
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| 10.What is electrical detonators used for? | They are used for starting fireworks off.
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| 11.Give one example of how you can put out fire? | You can put out fire by having energy to start the fire.
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| 12.What are some types of using fire on? | Some of the types are wood, paper, plastics and cloth.
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| 13.What is the fire triangle? | The fire trinagle is showing one of the ways to put out fire.
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| 14.What is a fuel? | A fuel is a substance which contains energy that can be changed into heat energy.
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| 15.What happens if there is no oxygen in a fuel? | If there is no oxygen, there will be no fire.
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| 16.What are candles made out of? | Candles are made out of wax.
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| 17.What does wax contain? | Wax contains a lot of carbon joined to hydrogen.
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| 18.What is another way to call Burning? | Another way to call burning can be combustion.
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| 19.What is another example of an fuel? | Another example of fuel is natural gas.
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| 20.What are explosives? | Explosives are chemicals which are designed to explode.
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