Changing States: Evaporation (Part 2)

What You'll Learn

Evaporation happens when liquid particles at the surface gain enough energy to escape into the air as gas. Condensation is the reverse—gas particles slow down and form liquid.

Key Words

product
conservation of mass

Materials Needed

measuring cups
paper towels
thermometer

Safety First

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

Test 5 household liquids (vinegar, milk, lemon juice, baking soda water, soap) with pH paper. Classify each as acid, base, or neutral.

Step 3 — Observe

Draw a detailed diagram of what you observe.

Step 4 — Record

Write a conclusion: what did your results show? Did they match your prediction?

Check Your Understanding

Question 1

1 of 3

What happens during evaporation?