Pure Substances, Mixtures, and Chemical Bonds Questions

A combination of two or more substances that are not chemically combined is known as a

• mixture

• molecule

• compound

• element

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

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

Type of matter with a fixed composition that cannot be separated by physical means

• heterogeneous mixture

• homogeneous mixture

• mixture

• pure substance

Which of the following is a pure substance?

• Gold

• Salad

• Air

• Salt water

A pure substance...

• is an element or a compound

• is an element or a mixture

• is a compound or a mixture

• is a mixture

Which of these statements describes a chemical property of an object?

• The object is blue in color.

• The object has a powdery texture.

• The object's density is 5.25 g/cm³.

• The object reacts with acid to form water.

What type of substance is ALWAYS made up of two or more different types of elements joined by chemical bonds?

• mixture

• element

• molecule

• compound

Which of the following in NOT true for compounds?

• Made up of elements

• Chemically combined

• Cannot write a formula

• Has new and different properties

Tags

NGSS.MS-PS1-1