Plasma: The Fourth State

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

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 3

What is an example of a physical change?