4
Lesson 4 of 84 · Human Impacts on Earth
ExperimentScientific Models: Representing Reality
What You'll Learn
Models help scientists represent complex systems. Physical models (like a globe), mathematical models (like equations), and computer models all simplify reality to make it easier to study.
Key Words
- control
- data
- observation
Materials Needed
- plastic wrap
- cardboard
- tape
- scissors
- straws
- paper clips
Safety First
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
- Dispose of materials properly after the experiment.
Steps
Step 1 — Read
Review the background information on Human Impacts on Earth before starting.
Step 2 — Do
Build a simple seismograph using a pen, cup, string, and paper. Shake the table and record the marks. Can you detect bigger vs. smaller shakes?
Step 3 — Observe
Look for patterns in your observations.
Step 4 — Record
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3What makes a good scientific investigation?