Classification of Matter

All substances are built from

• compounds

• oxygen

• metals

• atoms

About ______ elements are found on Earth.

• 9

• 90

• 900

• 9000

A(n) ______ is a homogeneous mixture of particles so small they cannot be seen without microscopes and will never settle to the bottom of their container.

• solution

• molecule

• element

• plasma

A(n) ______ is a mixture that settles upon standing.

• solution

• colloid

• suspension

• element

A(n) ______ is a mixture that does not scatter light.

• solution

• colloid

• suspension

• element

Any characteristic of a material that you can observe without changing the identity of the substances that make the material is a(n) ______.

• Physical property

• Chemical property

• Invisible property

• None of these

A change from one substance to another is a _____ change.

• Physical

• Chemical

• Atomic

• Impossible

The process for separating substances in a mixture by evaporating a liquid and recondensing its vapor is called ______.

• Precipitation

• Sifting

• Distribution

• Distillation

A substance is a type of matter __ a fixed composition.

• with

• without

____ is a substance in which the atoms of two or more elements are combined in a fixed proportion.

• An ion

• A compound