Active Time
20-30 minutes
Total Project Time
20-30 minutes
Key Concepts
The solar system, planets, scale model

Introduction

Did you know that there are more planets than stars in our galaxy? All of these planets circle around a star, but only eight of them—Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune—circle around the Sun—the star in our solar system. This activity explores the relative size of these eight planets. Will one be much bigger than the other, or are they all about the same size?

Credits

Sabine De Brabandere, PhD, Science Buddies
This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.

Materials

  • Play dough - store bought or homemade.
  • Balloons (4)
  • Metric ruler
  • Cardstock
  • Scissors
  • Marker or pencil
  • Glue or tape
  • Optional: Piece of yarn
    Materials needed to make a scale model of the planets in the solar system as described in this STEM activity.

Reviews

|
Science Buddies |
Was this review helpful?
Be the first one to review this activity.
Active Time
20-30 minutes
Total Project Time
20-30 minutes
Key Concepts
The solar system, planets, scale model
icon scientific method

Ask an Expert

Curious about the science?
Post your question for our scientists.

Free science fair projects.