I’m a science teacher. Most people, including students, think that air is made mostly of oxygen. In reality, oxygen only makes up 21% of our atmosphere. Air is mostly nitrogen — 78%. That leaves only 1% for everything else!
I made this bulletin board to show the percentages of different elements in the atmosphere.
In Microsoft Word, I opened an 11 x 17″ document and made 3″ circles all over it. I printed out enough to have 100 circles, for 100%. Then I went back into the document and added text boxes over the circles. I made the text boxes with no fill and no lines. Inside the text boxes I typed the symbols for the elements I wanted — 21 oxygen, 78 nitrogen, and one that had the basic trace elements and compounds found in the air (carbon dioxide, water, argon, and ozone.) Finally, I changed the circles to no lines. I adhered different colored PostIts onto the circles on the 11 x 17 printouts and sent them through my printer again.
I put the PostIts on the bulletin board and used the Cricut to cut out my letters spelling “air.” I just used the font from the Robotz cartridge. I taped two pieces of 12 x 12 cardstock together and put them on a 12 x 24″ mat. Using the “fit to page” button, it cut out at 11″.
Now my students have a clear picture of the makeup of air (and so do you!)