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7f reaction

QuestionAnswer
What is physical change? A change that does not involve new chemicals being made.Melting and freezing are examples of physical change.
What is reversible? A change in which what you end up with can easily be turned back into what you started with.
During a reaction chamicals may spit up or decomposed.What does Decomposed mean? This mean when one substance splits up into 2 or more products.
What test could you do to be sure that a gas is carbon dioxide? Limestone test
Give an example of corosion. Rusting is an example of corosion.
How can you call when the iron and sulphuric acids are toghether? This is called reactant.
What does the heat cause to cook the food? It causes chemical changes.
Electrical detonators are used to start the firework off.What doe detonator means? Something to start a reaction.
What is the word equation for magnesium oxide? Magnesium+oxide --> magnesium oxide
How does fire extinguishers work? It works by cooling the fire ,or by stopping oxygen getting to the fuel.
What does the heat cause to cook the food? It causes chemical changes.
Electrical detonators are used to start the firework off.What doe detonator means? Something to start a reaction.
What is it called when any chemical that is made of only carbon and hydrogen? It is called hydrocarbon.
How does fire extinguishers work? It works by cooling the fire ,or by stopping oxygen getting to the fuel.
Where does fuel,heat and oxygen shown in? This is shown in a fire triangle.
What is a fueL? A fuel is a substance which contains energy that can be changed into heat energy.
Candles are made from wax.What is wax? Wax is a substance that conatins a lot of carbon joined to hydrogen.
Give a word equation of carbon dioxide. methane + oxygen --> carbon dioxide + water
Give an equation of carbon monoxide. methane + oxygen --> carbon monoxide + water
What test could we do to see if carbon monoxide is working proberly. We can test by placing carbon monoxide detectors near to as applianxes
Created by: elizabeh ta
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