Classifying
Matter can be classified as either a mixture or a
pure substance
In a mixture, is the composition fixed or does it vary?
it varies
Give an example of something with high viscosity.
honey or maple syrup
give an example of a physical change
What are the two things a pure substance can be?
elements and compounds
What is an example of a homogenous mixture?
sugar water
A material that is malleable and conducts electricity is most likely
metal
What is a precipitate?
A solid that forms in a liquid mixture.
If an unknown substance CANNOT be broken down into simpler substances, it is
an element
What is NOT a pure substance?
Milk/ a mixture
Why does Rust form?
oxygen and iron are reactive
When a metal changes color because it has reacted with another substance, a(an) _____________________ change occurred.
chemical
What is not a compound?
an element/ IRON
What is an example of a heterogenous mixture?
italian dressing
A substance that has high reactivity...
easily combine chemically with others.
When a metal changes color because it has been heated, a(an) _____________________ change occurred.
physical
Why is water a compound?
fixed composition and broken down into hydrogen and oxygen
What method can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter?
distillation
What is something that looks like evidence of a chemical change but is NOT?
Iron changes color when heated