Pure Substances

A material with a particular chemical makeup

• mixture

• pure substance

• hetogeneous

• homogeneous

Substances that are made up of ONLY one type of atom (element) or compound.

• Heterogeneous mixture

• Pure substance

• Suspension

• Homogeneous mixture

Which of the following is classified as a pure substance?

• Lemonade

• Fruit punch

• ketchup

• Hydrogen

Which of the following is a pure substance?

• Water

• Sugar

• Gold

• ALL of them

Tags

NGSS.MS-PS1-4

A pure substance that consists entirely of one type of atom is better known as what?

• compound

• element

• monoatomic

• homogenous

What is the main difference between a pure substance and a mixture?

• Pure substances have variable compositions, while mixtures have fixed compositions.

• Pure substances can be separated by physical means, while mixtures cannot.

• Pure substances have a fixed composition, while mixtures have variable compositions.

• Pure substances are always elements, while mixtures are always compounds.

Which of the following best describes a compound?

• A mixture of two or more elements that can be separated by physical means.

• A pure substance composed of two or more elements chemically combined in a fixed ratio.

• A substance that cannot be broken down into simpler substances.

• A homogeneous mixture of substances.

What is a pure substance that cannot be broken down into simpler substances?

• Atom

• Element

• Molecule

• Compound

Pure Substance

• smallest particle of an element

• solid material whose atoms are arranged in an ordered pattern

• anything that has mass and takes up space

• single substance with definite composition and properties

Which of these is an example of a pure substance?

• Tap water

• Juice

• Milk

• Distilled water

Tags

NGSS.MS-PS1-4