From a first grader’s book:
Experiment #1
Begin the experiment “Acid Rain on the Reef” by discussing acid rain. Then explain to the students that chalk contains limestone just like the coral reefs. Explain to the students that this experiment will show how acid rain can harm the reef. Explain that each group will be given two pieces of chalk, which will represent the coral reef, a cup containing a vinegar/water mixture, which will represent the acid rain, and a cup of fresh water. The students will place a piece of chalk in each cup. Using a marker, students will write “acid” on the vinegar/water cup. Students will store cups overnight. Students will predict what will happen to the chalk in each cup.
Experiment #2
Begin the experiment “Acid Rain on the Reef” by discussing acid rain. Then explain to the students that chalk contains limestone just like the coral reefs. Explain to the students that this experiment will show how acid rain can harm the reef.
Explain that each group will be given two pieces of chalk, which will represent the coral reef, and two cups of saltwater.
The students will place a piece of chalk in each cup. Using a marker, students will write “acid” on one of the cups.
With the cup labled as "acid", the student will exhale into the cup and infuse it with Carbon dioxide from the student's breath.
Students will store cups overnight. Students will predict what will happen to the chalk in each cup.
On another subject, I loved hearing about your early years of obtaining satellite data.
In 1972, I had to place the path of the TIROS satellite on a polar projection of the Earth with a clear plastic template. Overlaid over my location on the Earth, was another plastic template, which could be used to figure out the azimuth and elevation. I would then write down the azimuth and elevation of the satellite for each minute that is would pass over my location.
Each minute, I would manually move the antenna to it's predicted position.
An oscilloscope would draw a line across it's screen, in response to the signal from the satellite. A Polaroid camera would record what was being shown on the oscilloscope.
If you did everything perfectly, you could actually locate a major storm over the United States.
35 years later, I am still doing the same thing.