Is normally called a mixture.
mixture
their composition can be varied
A pure substance has a fixed and uniform composition.
No. In a physical change, the substance maintains its chemical composition.
it is called a fixed composition
A substance or object that is not uniform in composition would be a heterogeneous mixture.
Mixture
their composition can be varied
A substance has a specific chemical composition while mixtures contain more than one substance.
A pure substance has a fixed and uniform composition.
a substance
No. In a physical change, the substance maintains its chemical composition.
What is a substance with constant composition
The composition of a substance is what it is made of.
Chemical Substance
It tells you what the substance is made of.
When a substance changes state, Energy within the substance is gained or lost, but the composition is unchanged.
substance and binder