Variables in Experiments

What You'll Learn

Variables in experiments include the independent variable (what you change), dependent variable (what you measure), and controlled variables (what you keep the same).

Key Words

hypothesis
variable

Materials Needed

paper clips
rubber bands
string
cups
aluminum foil
ruler

Safety First

Tie back long hair before starting the experiment.
Protect your work surface with newspaper or plastic.

Steps

Step 1 — Read

Read and learn: Variables in experiments include the independent variable (what you change), dependent variable (what you measure), and controlled variables (what you keep the same).

Step 2 — Do

Follow the procedure carefully, step by step.

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 a hypothesis?