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

Categorize

Options (6)

Organize these options into the right categories

Pure Elements

Not Pure Elements

Multiple Choice

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

• of the same

• compounds

• different

• hydrogen

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

These substance __________ be separated.

• can

• cannot

Multiple Select

Heterogeneous mixtures _________________.

• can be separated

• cannot be separated

• are not uniform throughout

• are uniform throughout

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 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