What to do
- Choose a sugar form (cube or crushed) and a water temperature.
- Choose stirring on or off. Press Start.
- Record the time. Run all six trials.
Controls
Data table
| Trial | Time to dissolve |
|---|
Copy your table onto your worksheet. No device? Use the Sample data table on the Teacher Prep page. Fill in your table from it.
Check yourself
Which trial was slowest? Why?
Cube, cold, no stir. It had the least surface area, the slowest particles and no mixing.
Which change helped the most?
Answers vary: crushing or heating.
Does heating change how fast or how much (or both)?
Both. It speeds up dissolving, and more solid can dissolve.
Try each question first. Then tap it to check.