ACS Inquiry in Action: Chapter 2 – Substances Have Characteristic Properties

NOTE: Those these are indicated for 5th grade, they best align with 8th grade AzSS standards.

Students investigate the solubility, density, and other properties of solids and liquids to identify substances based on their unique characteristics.

Lesson 2.1 – Using Dissolving to Identify Substances

Students compare the dissolving of salt and sugar and then conduct a dissolving test on unknown substances marked A, B, and C to investigate the question: Can substances be identified by how well they dissolve in water?

Lesson 2.2 – Identifying an Unknown Liquid

Students test four known liquids and an unknown liquid on two different paper surfaces to investigate the question: Can you identify liquids based on how they interact with different surfaces?

Lesson 2.3 – Mixing Liquids to Identify an Unknown Liquid

Students test four known and one unknown liquid with water to investigate the question: Can you identify an unknown liquid based on how different liquids interact with water?

Lesson 2.4 – Density and Sinking and Floating

Students repeatedly reduce the size of a clay ball while placing it in water to investigate the question: Does changing the amount of material in an object change the object’s density?

Lesson 2.5 – The Density of Liquids

After seeing the teacher compare the weight of equal volumes of water and corn syrup, students compare the weight of equal volumes of water and vegetable oil to investigate the question: Is vegetable oil more or less dense than water?

Posted in 8.P1U1.2, Middle School

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