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flash cards

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
What is a chemical reaction?   When chemicals join or break apart from each other.  
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what is the name when magnesium reacts with oxygen   magnesium oxide  
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What happens when there is a chemical reaction takes place?   A new substance is formed  
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What happens when a lit splint is placed into a jar with oxygen?   The light gets brighter  
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What are the 3 things a fire needs to keep burning?   fuel, oxygen, heat  
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what is the only way to take out a fire?   Take away 1 of the 3 things away  
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What is a physical reaction?   is when the reaction is reversible  
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What 2 fire extinguishers would you use on a wood fire?   Water and foam  
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What does fuel + oxygen create?   carbon dioxide + water  
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In water and ice a physical or chemical reaction?   Physical reaction  
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What is the meaning of decompose?   When 1 substance splits up into 2 or more products  
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At what temperature does carbon dioxide turn into dry ice?   -80C  
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What is the meaning of corrosive?   Can eat through living tissue  
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Can water rust steel cars over time?   yes it can  
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What turns rain into a weak acid?   The carbon dioxide in the air  
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What does carbon dioxide turn lime water when mixing?   turns the lime water milky  
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What is the meaning of irreversible?   Things you can not change back to its original form  
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What is the meaning of reversible?   Things you can change back to its original form  
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What is formed when magnesium is put on fire?   it will be bright and create white ash  
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What is the percentage of the amount of oxygen inside air?   20%  
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What is gunpowder used in?   fireworks and special effects in movies  
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What can happen when you use the wrong type of fire extinguisher on the wrong type of fire?   it can spread the fire  
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What does methane + oxygen create?   carbon dioxide and water  
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What is wax used for?   to burn candles  
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Is nitroglycerine unstable?   Yes  
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what is oxide?   A component containing oxygen  
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What is a fuel,Give four examples?   Wood, Coal, oil and petrol  
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What 3 factors make an explosion?   A large amount of gas is formed, a lot of heat is released, plenty of oxygen is available  
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Created by: nkruimer
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