Dry Ice Fog, Napkin Suction and more

S1 E4: Dry Ice Fog - A paper fence on the floor is to keep in a cloud, because they're going to experiment with dry ice, so called because it changes from a solid directly to a gas and does not melt. Stacey drops a small piece into a jar of hot water. The white bubbles are filled with carbon dioxide gas and water vapor. She adds a little detergent to the jar. Copious bubbles are produced which roll down the sides of the jar. They add many pieces of dry ice to the sink full of hot water. Water vapor spills out of the sink onto the floor. They appear to be walking in a cloud. Napkin Suction - Anna puts a drop of water on a paper towel which absorbs the water. They briefly discuss capillary action. Mr. Wizard has her fill a glass to the top with water. He places four pieces of paper towel on a saucer. Anna inverts the saucer and papers and places them over the glass. Mr. Wizard inverts the whole set up. They note that some of the water is absorbed by the towel producing a partial vacuum. Anna picks up the glass. Air pressure has glued the saucer to it. CRAWLING CELL - This is not a close-up of the sun or a picture of an explosion. It is a living individual cell similar to those you have inside of you. The cell is that round part in the middle and those lines around it are the result of an experiment by Dr. Albert Harris. COMPUTER GRAPH - Stacey enters with a list of students and grades from a science test. She wants to make a bar graph. Mr. Wizard shows how to enter the data into the computer. Stacey reads the instructions from the computer screen and enters the proper information. They print out the results which Stacey will take to class. STARCH TEST - On the table are samples of flour, sugar, typing paper, soda cracker, and aspirin. Angela knows starch comes from corn and wheat, is in foods like spaghetti, and is put on clothes to make them stiff. When iodine combines with starch, a blue black color is produced. Angela is challenged to determine which of the five items contain starch. LIZARD AUTOPSY - Lizards like this one live in the warm regions of every continent. But this one lives in the National Zoo in Washington, DC. And one of its cage mates that appeared to be healthy has just died. Why? FIND YOUR PULSE - As clues to guessing his heart rate, Mr. Wizard asks Michael to compare animals of different sizes and their heart rates: baboon = 100 times per minute; lion = 50; elephant = 25. Michael notes the smaller the animal the faster its heart beats. He guesses his beats 75 times per minute because he figures he is a little smaller than a baboon whose rate is 100 beats per minute.