Two Scoops, Two Answers, One Mixture

You'll learnwhy a mixture's proportions vary while each component's formula stays fixed.

Scoop twice from the same jar of salt and sand and the two scoops come back with different percentages. That is not a lab error; it is what a mixture is. Twelve short steps; press Next for each one.

12 STEPS · 6 QUICK CHECKS · NaCl + SiO₂ · v3

one jar · two scoops · two correct answers

Before you start

What you're looking at

Two scoops from one jar of salt and sand, blue grains and pink, beside an empty chart.

The question

Why did two careful scoops from the same jar give 60% salt and 30% salt?

Step 1 / 12