8.6A - Elements, Compounds, Molecules, and Mixtures

Classification of Matter: Elements, Compounds, and Mixtures

Review: Differentiating Elements, Compounds, and Mixtures (TEKS 8.5A Review)

Multiple Choice

Which of the following is an element?

• Water

• Iron

• Carbon Dioxide

• Salt

​Introduction to Matter

Matter is anything that has mass and takes up space. Matter is made up of atoms and molecules.

Multiple Choice

What are the two main components that make up all matter?

• Atoms and Cells

• Molecules and Compounds

• Atoms and Molecules

• Elements and Mixtures

Elements are pure substances consisting of only one type of atom.

​Elements

Multiple Choice

True or False: An element is a pure substance that can be broken down into simpler substances.

• True

• False

Compounds are pure substances made of two or more different types of atoms chemically bonded.

​Compounds

​This is a water molecule. It is made of 2 Hydrogen and 1 Oxygen atom which are bonded together. H₂O

Multiple Choice

Which is a compound?

• Carbon

• $$CO_2$$

• Salad

• Iron

​Mixtures

Mixtures are physical combinations of two or more substances.

​Hetero = different

​Homo = same

Match

Match the following mixtures to their type:

• Air

• Trail Mix

• Ice Cream

• Salad

• Saltwater

Homogenous

Heterogeneous

Homogeneous

Heterogenous

Homogenous

• Homogenous

• Heterogeneous

• Homogeneous

• Heterogenous

• Homogenous

Homogeneous mixtures have a uniform composition throughout.

​​Homogeneous Mixtures

Match

Label the following as Homogeneous or Heterogeneous: Milk, Salad, Vinegar, Trail Mix

Heterogeneous

Homogeneous

Heterogeneous

Homogeneous

• Heterogeneous

• Homogeneous

• Heterogeneous

• Homogeneous

Heterogeneous mixtures have a non-uniform composition, with visibly distinct components.

​Heterogeneous Mixtures

Open Ended

Explain why a salad is considered a heterogeneous mixture.

Categorize

Options (4)

Match the following

Homogeneous

Heterogeneous

Multiple Choice

Saltwater is classified as:

• Element

• Compound

• Homogeneous Mixture

• Heterogeneous Mixture

​Review and Summary

Open Ended

What is the key difference between an element and a compound? Provide an example of each.

Open Ended

Classify the substance: Iron (Fe). Is it an element, compound, or mixture? Justify your answer.