Question | Answer |
1.What is Chemical Reaction? | Chemical Reaction is in which new substances are made. |
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. |
3.If there is a physical change, are theire any new substances formed? | No, no new substances are formed. |
4.What is the definition of permanent or irreversible? | The definition is that new substances are formed during a chemical reaction. |
5.Can acids be corrosive? | Yes of course they can be corrosive. |
6.What is called iron and sulpuhric acid? | Iron and sulphuric acid are called reactants. |
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. |
8.What will happen if carbon dioxide and limestone mix together? | When they mix together it will go milky. |
9.Name the gas off when acids react with limestone. | Carbon dioxide. |
10.What is electrical detonators used for? | They are used for starting fireworks off. |
11.Give one example of how you can put out fire? | You can put out fire by having energy to start the fire. |
12.What are some types of using fire on? | Some of the types are wood, paper, plastics and cloth. |
13.What is the fire triangle? | The fire trinagle is showing one of the ways to put out fire. |
14.What is a fuel? | A fuel is a substance which contains energy that can be changed into heat energy. |
15.What happens if there is no oxygen in a fuel? | If there is no oxygen, there will be no fire. |
16.What are candles made out of? | Candles are made out of wax. |
17.What does wax contain? | Wax contains a lot of carbon joined to hydrogen. |
18.What is another way to call Burning? | Another way to call burning can be combustion. |
19.What is another example of an fuel? | Another example of fuel is natural gas. |
20.What are explosives? | Explosives are chemicals which are designed to explode. |