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Physical science · Grades 6–8

Dissolving Sugar

How does water temperature affect the time sugar takes to dissolve?

The lesson

What students do

A drink company wants a mixing guide. Compare dissolving time while keeping the sugar, water, cup, and stirring method the same.

  1. Measure the same volume of water into each cup.
  2. Check the water temperature.
  3. Add the same amount of sugar and stir at the same speed.
  4. Time until no sugar crystals are visible and repeat three times.

For teachers

Standards connections

This short investigation supports parts of these standards. It does not cover the full standard by itself.

MS-PS1-4Connect temperature to particle motion while explaining the observed rate.

PracticePlan an investigation and analyze results.

Big ideaCause and effect

Included results

Where the results came from

Classroom model results included with ConductClass

These are model results, not results from the linked lesson or a student class.

Science source: American Chemical Society: Temperature and Dissolving

Included

Ready for one class period.

Student instructions Included results Chart choices and calculations Teacher notes and review guide

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