# NASA - National Aeronautics and Space Administration

## Student Features

Text Size

Earth, Moon and Mars Balloons
Student Pages

Name:_____________________________

Use the information from this table to determine the scale of your Earth balloon and to calculate the size of your other models. Be sure to fill in any missing information from the tables. Measurements are presented in kilometers (km) and centimeters (cm).

 Body Diameter (km) Model Diameter (cm) Earth 12,756 20 Moon 3,476 Mars 6,794 Phobos 22

To find out what scale your Earth balloon is, divide the diameter of the Earth in km (12,756) by the diameter of the model in cm (20).

12,756 / 20 =

To find the diameters of the other two models, divide the actual diameter by the scale of the models (your answer from the last question).

 Image to right: When compared, Jupiter is larger than Saturn and Uranus.

Name:_____________________________

Use this table to calculate the distances between the planets.

 Bodies Average Distance (km) Model Distance (cm) Earth to Moon 384,000 Earth to Mars 78,000,000

To find the distance between each of your models, divide the actual distance by the scale of the models.

 Image to right: The Sun is the center of our solar system.