Diets – balanced and unbalanced
Objectives:
•I will know the seven components of a balanced diet and
the purpose of each
•I will understand foods are needed in different
quantities in different situations
•To describe what is meant by balanced diet.
•To compare meals and explain whether people’s diets are
balanced.
Keywords: Diet, balanced, deficiency, malnourished.
7 Components of a
Balanced Diet
Component
Food source
Purpose/Use
Protein
Fish, meat, eggs
To build and repair
cells
Carbohydrate
Bread, pasta,
cereal
To provide energy
Fat
Meat, chocolate,
butter
Insulation and
Energy
Water
Anything wet or
soggy!!
To keep you alive
Vitamins
Fruit, vegetables
Minerals
Red meat, spinach,
milk
Potatoes, fruit,
veg, cereals
Fibre
Keep everything
working properly
Calcium – strong bones
Iron – healthy blood
To keep everything
flowing smoothly!
Describe each meal (draw a picture if you want), include
details of the type of food they will provide you
with.Which meal provides the most energy? Is this meal a
balanced meal?
Comparing Meals!
With your partner, complete the following.
Write a short guide to what you believe are the
nutritional needs of a –
• Pregnant woman
• Heavyweight boxer
•A man with a broken leg
What’s on YOUR plate?!
What kind of food makes a healthy diet?
Lots of people talk about dieting all the time, and
they say pretty negative things about it…
But it is really important thing to get right!
What do YOU think makes a diet
healthy?
Four pictures one word!
d
c
r
l
a
____
i
h e
o t
h
n
a
r
f
Balanced diet.
Balanced diet: Eating the right amounts
of ALL the food groups for our bodies
to work properly.
Bounce!
• Name foods
that go under
the food group
your teacher
says!
• Last three
standing get a
HP! 3 mins.
Quick quiz! 1-5 in books
• 1) Which food group is the main source
of energy?
• 2) Which food group is our emergency
source of energy?
• 3) Which food group is responsible for
helping our body grow and repair itself?
• 4) Which food group helps our immune
system?
• 5) Which food group is essential for
ALL our body functions?
• You need to eat all 7 groups every day to be
healthy.
0
0
0
0
Which food groups do you need the most of?
_ _ _ _ _ (2Ltrs a day)
_ _ _ _ _ _ _ _ _ _ _ _ _ (fuel)
_ _ _ _ _ (roughage)
_ _ _ _ _ _ _ (growth, repair)
_ _ _ (storage)
_ _ _ _ _ _ _ _ (calcium)
_ _ _ _ _ _ _ _ (oranges)
Biggest!
Smallest!
Each f____ g____ is needed by my body to be
healthy.
I need to eat a b_________ d_____ to be
healthy.
A balanced diet means eating the right amounts
of carbohydrate, p_______, f_______, fat,
v________, minerals and w______.
A h_______ meal has all food groups at the
right amounts.
An unh_________ meal has the wrong amount
of each food group, (usually F….). This is called
an unb_______ meal. I will be malnourished if I
do not eat a balanced diet.
A balanced diet is not the same for every person.
Which food group does each person need
more of and why?
Professional athlete.
Growing child
Bodybuilder
What about a postman?
• The body builder…
• Needs more protein to
build and repair
muscles.
• The growing child…
• Needs calcium to build
healthy bones and
teeth.
• Needs carbohydrate
(for energy) and
protein
• Needs carbohydrate
for energy.
• The athlete…
• The postman…
Which word in each row is the odd one out?
Why?
Chicken
Cheese
Cereal
Fat
Water
Fibre
Bread
Cooking oil
Butter
Calcium
Oxygen
Iron
Potato
Chicken
Pasta
Green pepper
Pear
Tomato
Potato
Carrot
Lettuce
Plenary
Draw the Ladybird – add its legs and antennae
with the 7 components of a balanced diet.
Problems of an unbalanced diet
Objectives: to know the health problems linked to
being overweight
- to know why it is unhealthy to be underweight
Starter
What do you think this picture is trying
to tell you?
Obesity
Strokes
Diabetes
- your risk is doubled
- Risk rises rapidly with weight
Physical
Psychological Aspects
-Breathlessness
-Anxiety
-Mobility
-Low self-esteem
-Fitness
-Depression
Coronary Heart
Disease
-Low confidence
Cancer
Hypertension
(High Blood
Pressure)
- increased risk of colon,
breast, womb, kidney and
oesophagus cancer
Infertility
Deficiency Diseases
Night
Blindness
Malnutrition
Muscle Wastage
Infertility
Anorexia
Rickets
Psychological
Impacts
Anaemia
Scurvy
-low self
esteem
Task 1:
You have to use the information on an unbalanced diet to
produce a leaflet warning of the dangers of obesity and
malnutrition.
Task 2: Homework
Find out out many calories are in 1 bag of walkers
crisps, a can of coke and a Snickers.
How many bananas would you needs to eat to get the
same number of calories?
What exercise would you need to do and how much to
burn of those calories.
Homework
• Page 8 and 9 in your white books.
Healthy or unhealthy?
Where’s the
vitamins and
minerals?!
Healthy or unhealthy?

Healthy or unhealthy?
Where’s the
vitamins and
minerals?!
Healthy or unhealthy?
Where’s the
protein,
carbohydrate
and fat?!
Healthy
or
unhealthy?
Cheese sandwich

Healthy or unhealthy?
Where’s the
protein,
vitamins and
minerals?!
Healthy or unhealthy?
Bread.

‘Getting the balance right’
The food you eat during the day should provide you with enough energy to get through
the day. Even if you are lying in bed, completely inactive, you are still using energy to keep:




your heart beating
your lungs working
your body temperature constant
all the chemicals in your body going
The ‘ticking over’ speed at which our bodies work is the Basal Metabolic Rate (BMR). The
BMR varies from person to person.
My BMR is __________________
What happens if the balance is wrong?
If you take in more energy than your body needs it will store this extra as fat and your body
mass will increase.
If you do not take in enough energy, your body will use its fat reserves to provide energy and
your body will decrease in mass.
(sankey diagrams)
To work out your BMR –
Women: 661 + (4.38 x weight in pounds) + (4.33 x height in inches) – (4.7 x age) = BMR
Men: 67 + (6.24 x weight in pounds) + (12.7 x height in inches) – (6.9 x age) = BMR
To estimate the total number of calories your body needs each day, multiply your BMR by
the appropriate number given below:
* 1.2 for people who get little exercise
* 1.3 for people who get a moderate amount of exercise
* 1.7 for people who are very active
* 1.9 for people who are extremely active
For foodies…
Name the 7 groups you
need to make your meal
balanced.
Name two things that
might happen to you if
you do not eat a
balanced meal.
Plenary
For masterchefs!
John is a office worker
and Jill is a builder. How
would their diets be
different? (2 marks)
How would the diet of a
small boy be different to
an adult? (3 marks)