Unmotivated Slow Bored Motivated Faster Interested Reward!!!! Reward is the catalyst.
“Substance which can alter or speed up a chemical reaction, without itself being chemically changed at the end of the reaction” Speed up chemical reaction Without being chemically changed
catalyst Without Catalyst Slow reaction Needs a lot of energy to start reaction With Catalyst Faster Needs less energy to start reaction
Potassium Chlorate (VII) Melt during heating and produce oxygen Reaction is slow High temperature Add catalyst manganese (IV) oxide Reaction is faster Lower temperature No change to catalyst at the end of the reaction.
Enzyme is like a wrench Enzyme remains unchanged. Like wrench, it can be reused over and over again. Enzyme is specific E.g. wrench can only fit bolts of certain sizes. Enzyme speeds up reaction in both directions. E.g. wrench can take things apart or put them together
Catalyse chemical reactions in living cells Change rate of reaction Not chemically changed Catalyse reaction that Build up complex substances Break down complex substances Biological catalysts made of proteins