B1

• How can energy in food be measured using calorimetery


  weigh a small amount of food and put it on a skewer

  
  

  add water to a boiling tube

  
  

  measure the temp of the water

  
  

  set fire to the food using a bunsen

  
  

  hold the food under the boiling tube until it goes out

  
  

  then relight the food and put it in the boiling tube until it goes out

  
  

  keep doing it until the food wont catch fire again
• How do you calculate energy in food

  Mass of water x temperature change of water x 4.2
• how do you calculate energy per gram of food

  energy in food/mass of food
• Why do we need carbs

  to provide energy
• Why do we need lipids

  To insulate us and regulate body temp

  
  

  Provide energy
• What is protein for

  Growth and producing new cells
• What disease is by a lack of vitamin c

  Scurvy
• Why is it important we get iron in our diet


  Iron is in haemoglobin

  
  

  Haemoglobin is the protein in rbc that allows them to transport oxygen

  
  

  Lack of iron leads to anaemia
• Why do we need fibre

  To help food move through our intestines
• What three ways do we lose water

  Breathing

  
  

  Sweating

  
  

  Urinating