Science

• What is the major part of blood and cytoplasm in the diet?


  Water
• What is the primary function of carbohydrates in the body?


  Provides energy
• What are some foods that provide drinking water?


  Pasta, rice, cakes
• What vitamin is essential for healthy bones and teeth?

  Vitamin D
• What is the function of vitamin C in the body?


  For healthy gums and blood cells
• Which food is a source of iron for red blood cells?


  Red meat
• What is the role of calcium in the body?


  Makes bones and teeth stronger
• What is the deficiency disease caused by a lack of vitamin D?


  Rickets
• What are the symptoms of anaemia?


  Weakness, fatigue, dizziness
• What deficiency disease is caused by a lack of protein?

  Kwashiorkor
• What are the symptoms of kwashiorkor?


  Fatigue, diarrhea, swelling
• What deficiency disease is caused by a lack of calcium?

  Osteoporosis
• What are the symptoms of scurvy?


  Gum disease, muscle and joint pain
• Why do we need vitamins and minerals in tiny quantities?


  To keep us healthy
• What are the learning intentions by the end of the lesson regarding the DCPIP test for Vitamin C?


  • Carry out the DCPIP test for Vitamin C
  • Explain how to use the DCPIP test to measure Vitamin C in a solution
  • Know the colour change for the DCPIP test
• What is the initial color of DCPIP before the test?


  Blue
• What color does DCPIP change to in the presence of Vitamin C?


  From blue to pink to colorless
• What is the independent variable in the DCPIP test?


  The juice you test
• What is the dependent variable in the DCPIP test?


  Measuring the amount of drops you add
• What is the controlled variable in the DCPIP test?


  The DCPIP solution
• What are the learning intentions by the end of the lesson regarding food tests?

  • Know reagents used to test for Starch, Sugar, Protein, and Fat
  • Know the color change for each of the food tests
  • Have carried out each of the food tests
• What reagent is used to test for starch?

  Iodine
• What color change indicates the presence of starch when iodine is added?


  Turns blue-black
• What reagent is used to test for sugar?

  Benedict's solution
• What color change indicates the presence of sugar when Benedict's solution is heated?


  Turns brick red
• What reagent is used to test for protein?


  Biuret solution
• What color change indicates the presence of protein when Biuret solution is added?


  Turns purple
• What test is used to detect fats?

  Emulsion test
• What indicates the presence of lipids in the emulsion test?


  Turns cloudy white
• How much energy does 1 g of fat provide?


  38 kJ
• How much energy does 1 g of carbohydrate or protein provide?


  17 kJ
• What factors increase energy needs?


  Being very active, growing, being male
• What are the five main stages of digestion?


  1. Ingestion
  2. Digestion
  3. Absorption
  4. Assimilation
  5. Egestion
• How does food pass from the mouth to the stomach?

  By peristalsis
• What increases the surface area of the small intestine for absorption?

  The villi
• What is the role of the colon in digestion?


  Absorbs water and compacts waste food into feces
• What happens if the body does not absorb enough water?

  Dehydration and diarrhea may occur
• What are the adaptations of the small intestine for absorption?


  • Long and folded structure
  • Thin walls (one cell thick)
  • Rich blood supply
• What is the function of the mouth in digestion?


  Mechanical digestion using teeth
• What enzyme in saliva begins the digestion of starch?

  Amylase