Conservation: Protecting Our Resources (Part 2)

What You'll Learn

Conservation efforts protect natural resources and biodiversity. Reducing waste, recycling, protecting habitats, and using renewable energy all help preserve Earth's resources.

Key Words

conclusion
evidence

Materials Needed

rubber bands
string
cups
aluminum foil
ruler
markers

Safety First

Use materials only as directed in the experiment.
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

Review the background information on Engineering and Design before starting.

Step 2 — Do

Design and build a bridge from newspaper and tape that can hold a textbook. Test it and redesign to make it stronger.

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 the independent variable?