Crystals: How They Form (Part 2)

What You'll Learn

Crystallization occurs when a solution becomes supersaturated and dissolved particles form an orderly solid structure. Snowflakes, salt crystals, and rock candy form this way.

Key Words

mass
volume

Materials Needed

ice cubes
salt
sugar
vinegar

Safety First

Be careful with scissors — ask an adult for help if needed.
Do not look directly at the sun or bright lights.
Clean up spills immediately to prevent slipping.

Steps

Step 1 — Read

Study the diagram and label the parts you recognize.

Step 2 — Do

Heat ice and record the temperature every minute as it melts and then boils. Graph the temperature changes and label each phase change.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Check Your Understanding

Question 1

1 of 3

What is the chemical formula for water?