Florida SC.8.P.8.8

Science8th GradeProperties of Matter

The Standard

Identify basic examples of and compare and classify the properties of compounds, including acids, bases, and salts.

Florida Next Generation Sunshine State Standards for Science

Teacher's field guide

What Students Need to Do: Students identify familiar acids, bases, and salts using properties such as pH, indicator color, conductivity, and crystal form. They compare samples and classify unknown compounds from test evidence.
What Mastery Looks Like: Students correctly classify vinegar as acidic, diluted soap as basic, and sodium chloride as a salt. They cite two measured properties to support each classification.
Common Misconceptions: Students may think every acid is dangerous, every base is safe, or every salt is table salt. They may also assume all salts are neutral or that pH alone identifies a salt.
How to Assess It: Give students three results: pH 3 and blue litmus turns red, pH 11 and red litmus turns blue, pH 7 and a conductive crystalline solid. Ask them to classify each sample and cite one supporting result.

Lesson moves

Test vinegar, diluted dish soap, and saltwater with pH paper and a conductivity tester, then record evidence and classify each sample.
Write a claim explaining how pH, indicator color, and conductivity can distinguish vinegar, soap solution, and saltwater.
Sort property cards into acid, base, salt, or not enough evidence, then defend one difficult choice to a partner.
Examine ingredient labels from antacids, cleaners, foods, and sports drinks, then identify listed acids, bases, or salts.

Free download

A ready-to-print activity worksheet aligned to SC.8.P.8.8, with an answer key for the teacher on its own page. No account needed.

PDF, US Letter, prints cleanly in black and white.

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