2. 9B Fit and healthy
Fit and healthy
How fit are you?
Food for fitness
Caring for your health
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3. 9B Fit and healthy
How fit are you?
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4. 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?
oxygen carbon dioxide
respiration
water
glucose
energy
Which organ systems provide the things you need
for respiration?
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5. 9B In… out… in… out...
Stand up and feel your ribs! Can you feel these
movements when you breathe in and out?
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6. 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.
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7. 9B Know your pelvis from your elbow
A joint is a place where two or more bones meet.
Joints allow us to move.
shoulder
shoulder
a
Name these joints.
elbowb
Which are ball-and- hipc
hip
socket joints? wristd
fingere
Which are hinge joints? knee
f
ankle
g
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8. 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 contracting relaxing
triceps 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?
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9. 9B Hot and sweaty
Contracting is hard work for muscles. They get hot.
Respiration releases energy so that they can work.
Look at these thermal images. The hot areas of the body are red.
Which exercise belongs with which image?
sit-ups
swimming
press-ups
cycling
arm wrestling
sit-ups arm wrestling press-ups swimming cycling
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10. 9B Fit and healthy
Food for fitness
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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.
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12. 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 night blindness
unhealthy skin
vitamin B unhealthy skin teeth
weak bones and
vitamin C scurvy
night blindness
iron anaemia
calcium weak bones and teeth
scurvy
What foods provide these vitamins and minerals?
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13. 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?
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14. 9B Fit and healthy
Caring for your health
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15. 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.
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16. 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.
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17. Thanks
Submitted by
Harshit Pandey
St. johns Public School
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18. If you also want to share your own or your kid’s
presentation(ppt) please send it on
info@makemegenius.com
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