65
Lesson 65 of 84 · Properties of Matter
ExperimentPlasma: The Fourth State (Part 2)
What You'll Learn
Catalysts speed up chemical reactions without being consumed. Enzymes are biological catalysts that help reactions happen in living organisms at body temperature.
Key Words
- freezing point
- gas
Materials Needed
- plastic bottles
- balloons
- measuring cups
- paper towels
Safety First
- Keep small objects away from young children.
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
Steps
Step 1 — Read
Read and learn: Catalysts speed up chemical reactions without being consumed. Enzymes are biological catalysts that help reactions happen in living organisms at body temperature.
Step 2 — Do
Measure and record your data in a table.
Step 3 — Observe
Watch carefully for any changes and note the time.
Step 4 — Record
Create a data table to organize your measurements.
Check Your Understanding
Question 1
1 of 3What is an example of a physical change?