Physical and Chemical Changes
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Thanks for coming over to study! I need to pass this science exam.
No problem Jake!
Hey Mal, what are chemical and physical changes?
Chemical and physical changes happen all around us! For this one, lets go outside!
Another example would be water freezing in the fridge! It is just changing state, so it is physical!
Take this leaf, if I crush it up, that is a physical change.
Physical changes are changes that happen to its appearance. Not its chemical property.
What if I burn this candle? The candlestick is burning so that means it is a Physical change. Right?
Oh Jake! The candlestick burning is a CHEMICAL change!
How is that?
Whats another example of a chemical change?
So anything cooking/burning is ALWAYS going to be a chemical change.
Well, the candlestick is turning into ash and smoke, so that means it is changing into a brand new substance!
Another example would be baking a cake! The batter of the cake rises and changes from eggs, milk, and flour, to the sweet and delicious cake!
The cake is changing chemical properties from all the different substances to just one with TOTALLY new properties
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