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Physical & Chemical Changes (Physical (Physical Change n. Chemistry …
Physical & Chemical Changes
Chemical
Chemical change n. Chemistry -A reation that rearranges the particles of two or more substance to create at least one new substance
When you burn wood, wood turns into a new substance, ash, like baking, it can't be undone.
Chemical change always form a new substance
May absorb or release heat
May change colour, produce odor, create sound, release gas or produce light.
Usually can't be undone
Electrons are exchanged and a new substance is created.
Changing colour and tempurature is fireworks
Mentos and diet coke
Sodium and water, changing tempurature and colour
Cabbage juice mixed with all different kinds of materials.
Physical
Physical Change n. Chemistry
Something that changes the physical properaties of a
substance.
as size, shape or form
Cloth is a example of a physical change, even though it changes shape and size, it doesn't create a new substance.
A nother type of physical change involves changing states of matter, for example water, no matter what you do to water, water is still water.
Do not form a new substance
May change shape or size
May change state of matter
Can often be undone
Physical change is a change in appearence only
It can change volume, size, shape, phase change like solid to liquid solution that can be seperated.
A piggy bank can change it's size and shape only
Cutting, folding and breaking only changes in shape and size.
Ice break, from solid to liquid
You can seperate sugar cubes and coffee with evaperation