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8A
Key Stage 3 Science
| Question | Answer |
|---|---|
| What do we use to test for starch, and what does a positive and negative test look like | Add iodine. Positive = Blue/Black, Negative = No change (Orange/Brown) |
| What is the difference between malnutrition and a deficiency disease | Malnutrition = Too little OR too much of a nutrient. Deficiency disease = A disease caused by too little of a nutrient |
| Give an example of a deficiency disease and state which nutrient is responsible for it | Kwashiorkor = Protein ,Rickets = Vitamin D/Calcium ,Scurvy = Vitamin C A, naemia = Iron |
| How does obesity affect a persons health | Increased risk of heart disease, diabetes, and high blood pressure |
| Name 3 food groups and what they are used for in the body | Carbohydrates = Energy Store Fats (Lipids) = Energy source & store, Protein = Growth & Repair ,Fibre = Gut health ,Vitamins & Minerals = General health |
| In which organ are digested nutrients absorbed | Small intestine |
| How is the small intestine adapted to carry out its function | Contains millions of villi which increase its surface area. Has a very good blood supply |
| Which process allows digested soluble nutrients to be absorbed? Give a definition of this word | Diffusion = Movement of particles from an area of high concentration to an area of low concentration |
| What is an enzyme? Explain what they do | A biological catalyst. Speed up reactions eg. Breaking down large molecules into smaller ones |
| Where do we find amylase in the body? What does it do | Saliva and small intestine. Breaks down starch into glucose (sugars) |
Created by:
Davenant Foundation School
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