Examples: iron sulfide and some copper alloys.
false.
The chemical composition remain unchanged.
the chemical composition does not change.
Properties of materials depends on the chemical composition.
No. The chemical composition remains the same.
Assuming your gold is pure : Chemical composition = Au Chemical formula = Au
pure gold
Au
false.
TRUE
water, milk, sugar, mud, sweat, droppings
true j.miller
No. That is a chemical change. In a physical change, their is no change in chemical composition forming one or more new substances.
False. Changing the size and shape of pieces of wood is a physical change because the wood's composition does not change.
TRUE!
False. I believe the layers are assigned by temperature gradients.
The chemical composition remain unchanged.