2. Fit and healthy How fit are you? Food for fitness
9B Fit and healthy
Fit and healthy
How fit are you?
Food for fitness
Caring for your health

3. 9B Fit and healthy
How fit are you?

4. What does it mean to be fit?
9B How fit are you?
What does it mean to be fit?
If you are fit, your body is well set up for exercise.
For exercise your muscle cells need energy. Where does this come from?
energy
water
carbon dioxide
respiration
glucose
oxygen
Which organ systems provide the things you need for respiration?

5. 9B In… out… in… out...
Stand up and feel your ribs! Can you feel these movements when you breathe in and out?

6. Explain these observations about breathing and respiration.
9B Breathing and respiration
Explain these observations about breathing and respiration.
You need to breathe faster and deeper when you run.
Athletes tend to have big lungs.
Smokers often cannot run as fast as non-smokers.
If you are fit, your breathing rate returns to normal quickly after exercise.

7. A joint is a place where two or more bones meet.
9B Know your pelvis from your elbow
A joint is a place where two or more bones meet.
Joints allow us to move.
shoulder
hip
shoulder
elbow
hip
wrist
finger
knee
ankle a b c d e f g
Name these joints.
elbow
finger
knee
Which are ball-and-socket joints?
Which are hinge joints?

8. Which muscle contracts when you straighten your leg?
9B Antagonistic muscles
What are your muscles doing when you bend your arm? Are they contracting or relaxing?
muscle group
bending the arm
straightening the arm
biceps
triceps
contracting
relaxing
relaxing
contracting
The biceps and triceps are an antagonistic pair of muscles. What does this mean?
Muscles can only pull, not push. So one muscle pulls the bone one way, and the paired muscle pulls it back again.
Which muscle contracts when you straighten your leg?

9. sit-ups arm wrestling swimming press-ups cycling sit-ups arm wrestling
Contracting is hard work for muscles. They get hot.
Respiration releases energy so that they can work.
9B Hot and sweaty
Look at these thermal images. The hot areas of the body are red. Which exercise belongs with which image?
sit-ups
arm wrestling
swimming
press-ups
cycling
sit-ups
arm wrestling
press-ups
swimming
cycling

10. 9B Fit and healthy
Food for fitness

11. 9B Healthy diet
Apples are a healthy food. Would apples be healthy if they were all you ever ate?
Are there foods so unhealthy you should not eat them at all? Why might someone avoid a particular food?
A healthy diet contains a good mixture of different nutrients. What are the seven types of nutrient?
Explain why a breast-feeding mother needs a different diet from a housebound elderly man.

12. What foods provide these vitamins and minerals?
9B Vitamins and minerals
We need vitamins and minerals for our bodies to be healthy.
Match each one below to the effect caused if it is missing from the diet.
vitamin or mineral
effect if missing
vitamin A
unhealthy skin
vitamin B
weak bones and teeth
vitamin C
night blindness
iron
anaemia
calcium
scurvy
night blindness
unhealthy skin
scurvy
anaemia
weak bones and teeth
What foods provide these vitamins and minerals?

13. What happens to vitamin C when you cook vegetables?
9B Cooked to death?
What happens to vitamin C when you cook vegetables?
vegetable
vitamin C score
raw
cooked at 60 °C for 1 min
cooked at 60 °C for 5 min
cooked at 60 °C for 10 min
cooked at 100 °C for 1 min
cooked at 100 °C for 5 min
cooked at 100 °C for 10 min
Which has more effect – cooking time or temperature?

14. 9B Fit and healthy
Caring for your health

15. 1. Proteins are needed by the body for…
9B Health quiz
1. Proteins are needed by the body for…
a) growth and repair of tissues
b) a quick energy boost when you are tired
c) stopping you falling asleep in science lessons.
2. Overcooking vegetables can be bad for your health because...
a) cooking allows poisons to build up in vegetables and makes them all taste like Brussel sprouts
b) the heat destroys some of the vitamins
c) you will burn your mouth when you eat them.

16. 3. Exercise that raises your heart rate is good for you because…
9B Health quiz
3. Exercise that raises your heart rate is good for you because…
a) it makes it easier to find your pulse
b) it strengthens the heart muscle
c) it cleans out the arteries as the blood is forced through more quickly.
4. A doctor advised a very overweight patient not to go jogging. Which would not be a good reason for her advice?
a) it could put a strain on your knees
b) you don’t have a good sense of direction – could get lost
c) it could put a strain on your heart.

17. b) yes, provided you only smoke it in certain areas
9B Health quiz
5. Is cannabis legal?
a) yes, provided you only have a small amount for your own personal use
b) yes, provided you only smoke it in certain areas
c) no, cannabis is still illegal in the UK.
6. How much ecstasy can you take before you risk brain damage and even death?
a) one tablet
b) one tablet every week
c) one tablet every month.

18. Thanks
Submitted by
Harshit Pandey
St. johns Public School

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