Since blood production requires iron, you should eat iron-rich foods for two weeks before your appointment. This will help you have strong blood for donation and help you better recuperate after your donation. Iron-rich foods include spinach, whole grains, fish, poultry, beans, organ meat, eggs, and beef.
To calculate the change in temperature, subtract the initial temperature from the final temperature. Example: 84.2 degree Fahrenheit - 41 degrees Fahrenheit = 43.2 degrees Fahrenheit. The temperature from morning to afternoon changed by 43.2 degrees Fahrenheit.
Temperature is measured as degrees on a standard scale, such as Fahrenheit or Celsius. Water temperature is often measured with a thermometer. A thermometer has a liquid inside that expands as the temperature increases. The temperature is read from the scale printed on the thermometer. Temperature is also commonly measured with an electronic device called a thermistor (thermal resistor).