Pure Substances in Nature

___________ are the smallest unit of an element that maintains the properties of that element.

• Atoms

• Elements

• Compounds

• Mixtures

An _______________ is made up of one or more of the same kind of atom chemically combined.

• atom

• element

• molecule

• compound

A _____________ contains a variety of elements and compounds that are not chemically combined with each other.

• compound

• element

• molecule

• mixture

A __________________ is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity.

• mixture

• pure substance

• compound

• element

A ______________ mixture is one that does not have a uniform composition.

• heterogeneous

• homogenous

• pure substance

A _________________ mixture is one where the substances are evenly spread throughout.

• heterogeneous

• homogeneous

• pure substance

_______________ are mixtures in which its particles are too big to stay mixed without being stirred or shaken.

• Solutions

• Colloids

• Suspensions

A type of mixture that falls in between suspensions and solutions are called ______________.

• solutions

• colloids

• suspensions

• pure substances

Tea and air are examples of ________________.

• solutions

• suspensions

• colloids

Fruit Loops, pizza, and Skittles are examples of ____________________ mixtures.

• heterogeneous

• homogeneous

• pure