Science Buddies
Science Buddies: Heart Health: How Does Heart Rate Change With Exercise?
Your heart starts beating before you are born and keeps right on going through your whole life. Over an average lifetime, the human heart beats more than 2.5 billion times. Keeping your heart healthy means eating right, not smoking, and...
Science Buddies
Science Buddies: Got Iron? Measure the Concentration of Iron in Water
Iron is an important mineral essential for good health. Iron deficiency can be a problem. In this science fair project, use a simple iron test kit to measure the concentration of iron in water. This experiement is explained clearly and...
Science Buddies
Science Buddies: Effects of Exercise: Changes in Carbon Dioxide Output
Everybody knows that your body needs oxygen to keep going, and that you breathe out carbon dioxide as waste. What happens when you exercise? You've probably noticed that you breathe faster, and your heart beats faster. What triggers your...