1Mix 1 ounce of disappearing ink with 1 cup of water.
2Put the straw into the bottle.
3Blow bubbles and watch it change colors.
How It Works
Humans breathe in oxygen and breathe out carbon dioxide. Some of the carbon dioxide gas dissolves in the water and changes its acidity. Disappearing ink has a chemical in it that changes color when the water becomes more acidic. In the real world, due to the increasing amount of carbon dioxide in the atmosphere, the oceans are becoming more acidic too. This can be harmful to plants and animals, like corals, crabs, and lobsters, which may not be able to form strong shells when the water becomes more acidic. It’s one of the many alarming effects of increasing greenhouse gases.
Check out the Full Lesson on Intro to Climate Change!
In this lesson, we learn that:
Climate is the average weather over many years.
The Earth's average temperature has increased rapidly over the past century.
Scientists collect data to understand why the temperature is changing and what could be done about it.