Science 2 Flashcards
1
Q
Photosynthesis
A
-Plants use sunlight, water and carbon dioxide to create oxygen and glucose.
2
Q
Name the 7 nutrients needed in your body.
A
- Fibre
- Carbohydrates
- Fats
- Vitamins
- Minerals
- Water
- Protein
3
Q
Why is Fibre needed ?
A
Bowel movement
4
Q
Why are Carbohydrates needed ?
A
Energy
5
Q
Why is Protein needed ?
A
Growth and repair
6
Q
Why are Vitamins needed ?
A
Health
7
Q
Why is Fats needed ?
A
Warmth and energy
8
Q
Why are minerals needed ?
A
Health
9
Q
Why is water needed ?
A
Hydration
10
Q
What is starch ?
A
Starch is a form of carbohydrate
11
Q
How do you test for starch ?
A
- Add iodine solution to food solution
- If the solution turns dark blue/black= STARCH/CARBOHYDRATES
12
Q
How do you test for Fats ?
A
- Rub food on to grease paper
- Hold paper up to light.
- If paper turns translucent= LIPIDS
13
Q
How do you test for Protein ?
A
- Add copper sulphate & Sodium Hydroxide solution to food solution
- If the food solution turns purple= PROTEIN
14
Q
How do you test for sugar ?
A
- Add Benedict’s solution to food solution
- Heat the test tube in a water bath
- If the solution turns orange/red= SUGAR
15
Q
What is a renewable fuel ?
A
- A resource that never runs out.
- Example: solar energy,hydropower.
16
Q
What is a non-renewable fuel?
A
- A fuel that will run out.
- Example of fossil fuels: coal, oil, wood
