Please keep in mind that this is a research project, and there may
sometimes be glitches with the interactive software. Please
let us know of any problems
you encounter, and include the computer operating system, the browser
and version you're using, and what kind of connection you have
(dial-up modem, T1, cable).
In Mosaic, you can use different colors and lengths of blocks to fill
a canvas. Your first job will be to try to fill in the map of the USA
and approximate its area.
To add a block, first select the row to which you want to add your
block by clicking on the circle next to the corresponding row. Then
enter the value of the block by changing the values of the numerator
and the denominator of the fraction (for example, to change the
denominator, click on the number in the denominator; this will
highlight the number and you can replace it with the one you want).
Then select the color of your block by clicking on one of the color
swatches. You will see a preview of your block above the swatches.
When you are ready, click the "Add Block" button.
Each row has an area of 1 square unit. This means that if you add a
fraction block of 1/3, you are filling 1/3 square units of space.
- What is the approximate area of the map of the USA?
- How could you get a better estimate of the area of the map of the
- Design your own image, and use Mosaic to create it. Describe it
here, briefly explaining how you made it.