Everything Kids' Magical Science Experiments Book Read Online Free Page B

the scissors to cut three small holes in the plastic bottle. One hole should be above the middle of the bottle, one should be near the middle, and one should be about four inches from the bottom. The holes should be about the size of a nail hole.
While placing your fingers over the holes, fill the bottle with tap water.
Place the bottle inside the cake pan so that water can stream out without spilling on the counter.
At the same time, remove all three fingers covering the holes and watch how the water streams out.
The Science Behind the Magic
    At first it seems that the water should be streaming out the same no matter where the holes are. However, water has weight. The more water there is pressing down at the spot where the holes are, the more water pressure there is, and the faster it comes out. This is why the water coming out of the top hole doesn't flow out very fast or far. The middle hole produces a stream that moves faster than the top one, and the bottom hole has water squirting out of it very quickly.
Follow-Up
    You may have read in other science experiment books about an activity where you produced layers of liquids, such as oil, water, and corn syrup. You can try that here with the added twist of watching the liquids pour out of the holes. To do this, you will Life in a Fun House need to keep the holes covered with pieces of tape until you are ready to release the liquids. Pour enough corn syrup or pancake syrup to fill the bottle to a point above the first hole. Then pour in enough water to fill the bottle to a point above the second hole. Finally, pour in enough cooking oil to fill the bottle to a point above the third hole. Now return the bottle to the cake pan. Quickly and carefully remove the three hole covers and watch to see how these three liquids pour out. What happened?

The Amazing Race

    This toothpick can race across the surface of the water to find three answers to the riddle! Read the letters along each path from START to END. Magic!
Ironing Out Your Cereal
    Question: Is There Really Metal in Cereal?
    KIDS' LAB LESSONS

Experiment Overview
    Many dry breakfast cereals claim that they are “fortified” with vitamins and minerals. But what are these important additions to your breakfast, and are they all good for you? In this experiment, you will be examining various iron-enriched cereals. Iron is a metal that is commonly found in buildings, railroads, and tools. But it is also found in your blood. You will use a magnet to dig for this metal in a bowl of cereal and will do some comparisons between different brands to identify which brand contains the largest amount of iron.
Science Concept
    It may seem a little strange to think about there being pieces of metal in your cereal, no matter how small they are, but it's true. Tiny pieces of iron are added to some cereals as a way to improve blood flow. You see, iron in your blood helps your body make hemoglobin. Hemoglobin is a protein that helps your blood carry oxygen to the rest of your body. People who have low iron levels in their blood are said to be anemic, and if their iron level drops too low, their bodies begin to show signs of tiredness and lethargy.
    Some cereal manufacturers add tiny pieces of iron, called iron filings, to their cereal. If you were to ingest large pieces of iron, it would be dangerous for you. But these tiny pieces, almost invisible, and in small amounts, actually help your blood do its job of carrying oxygen throughout your body.
Materials
    3 cups of Total brand iron-fortified cereal
    ( NOTE: Total makes a number of different kinds of cereal, but all claim to be iron-fortified, so choose one you are likely to want to eat after the experiment is complete.)
Water
Blender or large spoon
Non-metallic bowl
Strong bar magnet
Sheet of white computer printer paper (optional)
    EXPERIMENT NOTE: A regular refrigerator magnet is not strong enough to attract the iron filings. You need to use a strong magnet, and one shaped like a bar