This steam cleaner never let us down during testing; in fact, our tester Caramel thought it was so excellent that she found it difficult to step away from it as she envisioned other things in her home she could clean. Small spiders can hang by their thread and let the wind blow them from spot to spot. To discourage peeing on the spot while the mattress dries, cover the bed with a large plastic sheet or tarp when you’re not using it, or take a large box, cut it down, and lay it over the top of the bed when you’re not using it. Does it cover more than one computer? Cover the top of the bottle with your hand, turn it upside down, and put it into the bowl next to the ruler. Put a piece of ice over the top of the bottle and watch fog develop. Once the bottle top is under­water, you can take your hand away.

Step 4: Examine both cardboard squares with a magnifying glass and see if you can count the number of small particles sticking to them. Make a small hole on one end of the cardboard, and tie a piece of string through the hole. With the bottle still standing upside down, tie the ruler to the bottle with string. Step 1: First, stick a ruler into a lump of modeling clay. Then put the clay and ruler in the bottom of a bowl. Punch a hole on one corner of one piece and put a string through it for hanging. Which has more particles: the cardboard that was lying flat or the one hanging? Step 3: Coat one side of the second piece and lay it flat in the shade, also sheltered under the eaves of your house. Coat both sides with petroleum jelly and hang the cardboard up under the eaves of your house. Smear one side of the cardboard with vegetable oil or petroleum jelly. It picks up passengers from one place and transports them to another. About how much milk does an average dairy cow produce in one day’s work? Melanocytes actually produce two different pigments: eumelanin (brown) and phaeomelanin (yellow and red).

Step 1: With two simple tests, you can check the air for common pollutants. Then you can see yourself that the air pressure is high. What other ways can you think of to use wind? Along with cleaning monthly, make it a habit to leave the machine door ajar or lift the lid after each use. Leave the cardboard in the wind for an hour or more. Leave both pieces in place for a day. Check the rubber bands each day. Check out Apple’s article on the iPhone’s built-in water-damage indicator. If you like manicure-pedicure combos, watch out for “whirlpool” footbaths. The wind is sometimes like a bus or train. Step 3: Some plants (like the dandelion) use wind to help scatter their seeds far away. The water they use comes directly from the water heater, and wastewater is drained into the sink’s drainpipe. Tape this strip of paper to the bottle with the halfway mark at the same level as the water in the bottle.

Wipe the grids with a paper towel that has been dampened with vegetable oil. The rag will absorb the oil. If the air pressure is low, the bowl’s water will rise, the bottle’s water will sink, and you’ll get a lower pressure reading. Blowing in the Wind is a science experiment for kids that measures the objects that are carried on air currents. The faster they become brittle, the more pollutants there are in the air. In the first test, measure how much dust, dirt, soot, and other floating material is in the air. It may surprise you to learn how much you can save just depending on where you buy it. Learn how to make a Weather Station with your kids so that you can measure and predict the weather. You and your kids can make a water barometer that will show you the changes in the air pressure. As the air pressure in the room increases, it will push down on the water in the bowl, forcing water up into the bottle.