Properties of Matter, Pure Substances and Mixtures

If sugar and Kool-Aid were dissolved in water, would the combination be a compound or a mixture?

• A mixture because the sugar, Kool-Aid and water molecules were not chemically combined and can easily be separated.

• A compound because it was chemically combined and cannot easily be separated.

Tags

NGSS.MS-PS1-2

The ability of a substance to catch on fire and burn is a

• chemical formula.

• state of matter.

• chemical property.

• physical property.

Tags

NGSS.MS-PS1-2

Pizza, soil, and lemonade are all examples of

• compounds.

• atoms.

• mixtures.

• elements.

What type of substance is always made up of a single type of atom?

• mixture

• element

• molecule

• compound

A water molecule is made up of one oxygen atom and two hydrogen atoms (H₂O). Why is water considered a pure substance?

When in doubt, use the process of elimination. Work backwards, which answers are NOT correct. The correct answer will be obvious.😉

• Water can be broken down by physical means.

• Water can be combined with other substances by physical means.

• Each water molecule is identical.

• Water molecules are made up of different types of atoms.

Tags

NGSS.MS-PS1-1

Pure substances can be ​ (a)   and

mixtures can be ​ (b)  

• elements or compounds

• elements and homogeneous mixtures

• compounds and homogeneous mixtures

• elements and heterogeneous mixtures

• compounds and heterogenous mixtures

• homogeneous and heterogenous.

In the following diagrams, the spheres represent particles. Different shadings represent different particles. Which of the following contains only one pure substance?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Which boxes contain Pure substances?

• Only box C

• Boxes C, F and I

• Boxes A, D and I

• Boxes A, C, D and I

• Boxes B, E, G, H

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

​ ​ (a)   All particles in a pure substance have the same physical and chemical properties.

​ (b)   All particles in a mixture have the same physical and chemical properties.

​ ​ (c)   Pure substances are made one type of particle while mixtures are made of many.

• FALSE

• TRUE

Tap water is a ...

• homogeneous mixture

• heterogeneous mixture

• pure substance

• super substance