Make a model of the greenhouse effect. You will need two nonmercury thermometers, one large plastic bag such as a produce bag, one small plastic bag such as a sandwich bag, and two twist ties. Place...

Make a model of the greenhouse effect. You will need two nonmercury thermometers, one large plastic bag such as a produce bag, one small plastic bag such as a sandwich bag, and two twist ties. Place one thermometer in the small bag. Blow into the bag to inflate it, and tie it with a twist tie. Put the inflated bag inside the larger plastic bag. Inflate the large bag, and seal it with a twist tie. Now lay the bags containing the thermometer on a sunny windowsill or outside. Lay the unbagged thermometer next to it. Observe the temperature reading of both thermometers after 30 minutes. Explain your results.

Q863;

1. The next time it rains, hold a sheet of black construction paper flat in the rain for a moment to catch a few raindrops. When you go inside, look at the marks the drops made. Are all raindrops the same size?

2. Suppose it’s July 1. Rank the following locations in terms of the solar intensity they receive, from most to least: northern Africa, northern Canada, New York.