By Robert Gardner

How does antibacterial cleaning soap have an effect on micro organism? What nutrition meets your strength standards? how will you degree blood strain, metabolic fee, and energy? younger scientists know about the clinical strategy whereas experimenting with hygiene and healthiness. Many experiments during this booklet contain principles you should use for technological know-how reasonable tasks.

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Science fair judges tend to reward creative thought and imagination. However, it’s difficult to be creative or imaginative unless you are really interested in your project. If you decide to do a project, be sure to choose a topic that appeals to you. Consider, too, your own ability and the cost of materials. Don’t pursue a project that you can’t afford. If you decide to use a project found in this book for a science fair, you will need to find ways to modify or extend it. That should not be difficult because you will probably find that as you do these projects new ideas for experiments will come to mind.

After you use it, clean the thermometer with cotton soaked in rubbing alcohol. After the thermometer has dried, use it to measure someone else’s body temperature. Is that person’s temperature the same as yours? If not, does one of you have a fever? Measure the body temperatures of a few healthy volunteers. Are they all the same? If not, by how many tenths of a degree do they differ? 6°F”? FIGURE 4: Body temperature may be measured with a digital thermometer (a) or a nonmercury thermometer (b). Chapter 2 The Effects of Body Position, Exercise, and Conditioning HOW DOES BODY POSITION AFFECT HEART RATE, BREATHING RATE, BODY TEMPERATURE, AND BLOOD PRESSURE?

Listen for two sounds in close succession. The first is a relatively long, booming sound. The second is a short, sharp sound. Together they make a “lubb-dup” sound. The “lubb” is caused by the contracting muscle and the closing of the valves between the heart’s chambers (the ventricles and atria). The “dup” is the sound made by the closing of the valves between the heart and the two major arteries into which blood is pumped (the aorta and the pulmonary artery). These arteries and valves can be seen in the diagram of the heart shown in Figure 2.

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