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
model

Materials Needed

pennies
plastic wrap
cardboard
tape

Safety First

Adult supervision recommended.
Do not taste any materials.
Wear safety goggles when mixing liquids.

Steps

Step 1 — Read

Review the background information on Waves 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?