Learning outcomes

Students will be able to:

• Measure mass with a tared balance, and volume by water displacement, reading the meniscus correctly.
• Calculate density and percent error, and identify unknown materials by their density.
• Predict whether an object floats or sinks by comparing its density with water's.
• Use measured evidence to evaluate a claim, as Archimedes did with the king's crown.

Standards alignment

• MS-PS1-2 NGSS (supports): Analyze and interpret data on the properties of substances, such as density, to identify them.
• SEP 3, 4, 5 NGSS Science and Engineering Practices: plan and carry out investigations, analyze and interpret data, and use mathematics.

Includes

Five lab stages with a drawn balance, graduated cylinder, and overflow can; random sample sizes so every student collects their own data; and a printable lab worksheet. A teacher answer key is available from Logical Home Schooling.

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