pure substance vs. mixture

Presentation

•

Chemistry

•

8th Grade

•

Medium

•

NGSS

MS-PS1-1, MS-PS1-2, MS-PS1-4

Standards-aligned

Dorothy Burford

Used 8+ times

FREE Resource

7 Slides • 17 Questions

Element

Compound

Homogeneous
mixture

Heterogeneous
mixture

• One type of atom
• Found on the periodic table
• One capital letter

Examples:

Visual Representation

How to Distinguish

Elemental Molecule

• Two or more types of atom chemically

combined

• Two or more capital letters
• One substance with diﬀerent elements

HBr

NH3

H2O NaHCO3

Examples:

Visual Representation

How to Distinguish

Multiple Choice

Study the diagram. Which of the following is represented in the diagram?

monoatomic element

elemental molecules

compound molecules

Multiple Choice

Study the diagram. Which of the following is represented in the diagram?

monoatomic element

elemental molecules

compound molecules

Multiple Choice

Study the diagram. Which of the following is represented in the diagram?

monoatomic element

elemental molecules

compound molecules

Multiple Choice

What is this?

element

compound

mixture

Multiple Choice

What is this?

aluminum (Al)

monoatomic element

compound

elemental molecule

Multiple Choice

All of the following are elemental molecules EXCEPT:

carbon

C₄

nitrogen

N₂

oxygen

O₃

water

H₂O

Multiple Choice

All of the following are compounds EXCEPT:

hydrogen

sodium chloride

NaCl

water

H₂O

carbon dioxide

CO₂

• Looks like one substance
• One phase
• Two or more substances
• “NaCl and H2O”

• Anything dissolved in H2O
• Salt Water
• Air (“O2 and N2 and CO2”)

Examples:

How to Distinguish

• Can see separation of

diﬀerent substances

• Two or more phases

• Oil and Vinegar
• Granite
• Potting Soil

Examples:

How to Distinguish

Multiple Choice

Chicken noodle soup is

Homogeneous mixture

Heterogeneous mixture

Multiple Choice

A bottle of dishwashing detergent contains a label on the back. The label has a long list of ingredients, including water, sodium lauryl sulfate, fragrance, and Blue dye #5.

What can you infer about the material in the bottle from this label and the appearance of the liquid?

It is a heterogeneous mixture.

It is a homogeneous mixture.

Element

Compound

Homogeneous
mixture

Heterogeneous
mixture

Multiple Choice

What is gold?

Element

Compound

Homogenous mixture

Heterogenous mixture

Multiple Choice

What is hot cocoa?

Element

Compound

Homogenous Mixture

Heterogenous mixture

Multiple Choice

What is carbon dioxide (CO₂)?

Element

Compound

Homogenous Mixture

Heterogenous Mixture

Multiple Choice

What is soda?

Homogenous Mixture

Heterogenous Mixture

Element

Compound

Multiple Choice

What is neon (Ne)?

Element

Compound

Homogenous Mixture

Heterogenous Mixture

Multiple Choice

What is pizza?

Element

Compound

Homogenous Mixture

Heterogenous Mixture

Multiple Choice

What is water (H₂O)?

Element

Compound

Homogenous Mixture

Heterogenous Mixture

Exit Slip- Match It!

Match

Match the following models to their correct descriptions.

mixture of elements

mixture of elements and compounds

mixture of compounds

elements

compounds

Element

Compound

Homogeneous
mixture

Heterogeneous
mixture

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