ECM 2025-26

Multiple Choice

Pure substances ______________ be broken down by chemical means.

• can

• cannot

• sometimes

• will

Multiple Choice

Elements are represented by one or two ____________ symbols.

• number

• emoji

• letter

• heterogenous

Multiple Choice

A compound is composed of two or more ___________ elements bonded together.

• of the same

• compounds

• different

• hydrogen

Categorize

Options (6)

Organize these options into the right categories

Pure Elements

Not Pure Elements

Multiple Select

Which of the following are compounds? Select all the correct answers.

Multiple Choice

What element is common among all living things?

• Carbon
• Oxygen
• Hydrogen
• Nitrogen

Multiple Choice

Mixtures are substances __________ be separated.

• can

• cannot

Multiple Select

Which of the following are mixtures? Choose 2

Multiple Choice

A homogeneous mixture has uniform (all looks the same) composition.

• True

• False

Multiple Select

Heterogeneous mixtures _________________.

• can be separated

• cannot be separated

• are not uniform throughout

• are uniform throughout

Multiple Choice

Heterogeneous mixtures (do/do not) have uniform properties throughout.

• do

• do not

Multiple Choice

Heterogeneous mixtures are easily separated.

• true

• false

Use your notes to help you answer the following quiz questions.

Multiple Choice

Contains only one kind of atom.

• Element
• Compound

• Mixture

Multiple Choice

Contains two or more atoms combined

• Elements
• Compounds
• Mixtures

Multiple Choice

The air is a _________. 

• element 
• mixture 
• compound 
• energy 

Multiple Choice

Elements can be broken down into simpler substances. 

• false 
• true 
• sometimes 

Multiple Choice

Examples are milk and gasoline.

• elements
• mixtures
• compounds

Multiple Choice

Examples are diamonds (C) and Uranium (U)

• elements

• mixtures

• compounds

Multiple Choice

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Multiple Choice

Diagram "a" is an example of a(n)

• element

• compound

• mixture

Multiple Choice

What does this illustrate?

• Elements

• Compunds

• Mixture of Elements and Compunds

• Mixture of Compounds