Mixtures, Compounds, and Pure Elements

Mixtures, Compounds, and Pure Elements

by Michelle Harris

Essential Questions

How is matter classified based on its composition?

Why is an element a pure substance?

How are compounds represented?

Why is a compound a pure substance?

Multiple Select

Check all the true statements

• All matter is made up of elements.

• A pure substance is a chemical substance that has a uniform and specific composition.

• Mixtures are a combination of pure substances.

• An element is made of one kind of atom

• The Periodic Table of Elements identifies known elements. The Periodic Table of Elements identifies known elements.

Multiple Choice

What are the two characteristics of matter?

• has mass and length

• has elements and mixtures

• length and width

• mass and takes up space

Multiple Select

Which of the following do you think is s pure substance?

• Gold

• Al

• kool-aid

• milk

Multiple Choice

Which contains only elements?

• A

• B

• C

• D

Multiple Select

Which contains a mixture? (Choose all)

• A

• B

Multiple Choice

Which is a heterogeneous mixture? (Choose all)

• 1

• 2

• 3

• 4

Multiple Choice

Salt dissolves in water like ----

• Pepper dissolves in water
• Sugar dissolves in water
• Rocks dissolve in water
• Seeds dissolve in water

Multiple Choice

To dissolve in water.

• solubility
• density
• mixture
• evaporation

Multiple Choice

In which mixture can you see all of the parts?

• homogeneous

• heterogeneous

Multiple Choice

In which mixture can you not see all of the parts?

• homogeneous

• heterogeneous

Multiple Choice

What is a mixture?

• elements chemically combined
• a combination of different things
• it is found on the Periodic Table 
• it is made of chemical

Multiple Choice

The air around was is  a mixture of gases.

• True
• False

Multiple Choice

A combination of two or more substances.

• mixtures

• separate

• solid

• whisk

Multiple Choice

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Multiple Choice

Contains only one kind of atom.

• Element
• Compund
• Mixture

Multiple Choice

What is the picture displayed?

• atom
• element
• molecule
• compound

Multiple Choice

Choose the option that cannot be a chemical symbol.

• a

• H

• O

• Cl

Multiple Choice

What is the result of a CHEMICAL change?

• mixture

• element

• compound

• pure substance

Multiple Choice

What is the building block of all matter?

• legos

• symbols

• letters

• elements

Multiple Choice

Ice melting into water is a ....

• chemical change

• physical change

Multiple Choice

Which is NOT a compound?

• CO₂

• H₂O

• S

• SiO₂

Multiple Choice

Which of these substances can be a compound?

• CO₂

• C

• O₂

• Red Bull

Multiple Choice

Which one of these is NOT a pure substance?

• Elements

• Mixtures

• Compounds