Transcript Slide 1

By Wolvercote Primary School
Year 5 and 6 science club
What do all these food amounts have
in common?
Answer
• These foods all have 200 calories in them.
Calories are how we measure how much
energy a food gives when you eat it. You do
this by burning the food in your body. You
would get the same amount of calories eating
all that kiwi fruit or a small lump of butter!
Calorimeter
Experiment
How do we find out how much
energy there is in food?
Our calorimeter
• We made our own
calorimeter, a device
that measures how
many calories there are
in different foods. Here
is a picture of our
calorimeter.
Our Calorimeter
• Here is a diagram of our
calorimeter. The heat
from the burning food
will change the
temperature of the
water, and then we can
see how many calories
there are in the foods
using the evil
calculations coming up.
Ginger Biscuit
• First of all we tried to
burn a ginger biscuit.
This was very hard to
burn because the match
kept on going out when
it got near the biscuit.
But, finally we got it
burning and the water
changed by 400c.
Quaver
• When we burned the
quaver, it was way
easier than the ginger
biscuit but it still took 3
times to set it light.
When we did, it burned
really well! The
temperature changed
by 22o c.
Peanut
• We also burnt a peanut.
This was really hard
because the peanut
didn’t seem to want to
stay on the wire! But
eventually we managed
to get the peanut on
and it set off a huge
flame, and the water
changed by 27oc.
Fails
• We also tried to burn
butter, and it easily got
onto the stick, but as
soon as it touched the
flame from the match, it
started melting and our
results were a pile of
melted butter. We’re glad
it’s not up to us to
measure the calories of
the foods that go into
shops!
• As you will find out in the
next slideshow, our
results were very, very
wrong.
Calculations
(Evil ones)
Calorimeter Calculations
After burning the foods on the calorimeter and gathering our results, we
started on the calculations. These helped us to find out how much energy the
foods gave us.
Peanut:
M=60g
C
DT=27oC
We put the results through this horrible equation:
cal = mcDT
After a LOT of thinking... We ended up with this: Our results for the peanut
was.... 249.2 kcal per 100g. In the next slide we will show you how wrong our
results were...
The “Real”
Results
Our Results
Peanut: 249.2 kcal per 100g
Ginger biscuit: 450 kcal per 100g
Ginger biscuit: 4 kcal per 100g
Peanut: 622 kcal per 100g
Quavers: 515 kcal per 100g
Quavers: 184 kcal per 100g
Oat cake: 90 kcal per 100g
Oat cake: 418 kcal per 100g
Can you tell why we were slightly
embarrassed!?
UH-OH?
Ok, we got it a little bit wrong.
After that minor setback we began
to ask ourselves a question:
A child’s GDA (The number
of calories a child should
have in a day) is 1800 kcal.
Why can’t you just live on
quavers which only have
88kcal per packet?
Food groups
How do different foods help our
bodies?
Bob
fighting
germs
and
bacteria
with
cucumber.
Vitamins and Minerals
Vitamins and minerals are found in fruit and
vegetables, and sometimes in meat. They are very
good for you and help to stop diseases.
Cucumber full of
vitamins and
minerals.
Evil germs
and
bacteria
being
defeated.
•Proteins can be found in tissue (they are muscles).
• You can get proteins in these foods such as: chicken,
fish, nuts and butter.
•Proteins are made out of Amino acids.
•Proteins are body building foods.
•Proteins can be found in dairy products.
•Egg white is nearly all protein and water.
•Proteins repair your body.
•It would be bad for us if we did not eat proteins.
If you don’t eat
protein you might
get ill like Bill.
Did you know
that proteins can
come in most
meat!
DID YOU
KNOW...
Fats
Soap is
made of fat!
•Too much fat = very bad!
•Smaller amounts = very good!
•You can find fat in milk, yogurt, biscuits,
butter, and lots more.
•Fats give us certain chemicals which we
need, but too much fat can cause heart
disease.
•They give us energy to move.
Carbohydrates
(sugars and starches)
Carbohydrate=Energy.
Energy=You can work like a
car with petrol.
Sugar=Energy...but not for
long.
Starch=Lonnnnng
DID YOU KNOW?
It would be
almost
impossible to go
through a day
without any
carbohydrate.
Rice, pasta,
spaghetti,
cereal,
potatoes, bread
= Carbohydrate!
VROOM, VROOM
=
For a
long
time.
2 minutes later...
=
Interview with an
athlete
What foods do athletes need to
eat?
Our Interview with Noe Orozco
We interviewed Noe Orozco to find out the diet of a tri-athlete. Noe is an amateur tri-athlete. A
Triathlon consists of running, swimming AND cycling! Here are some of the key findings from
our interview.
Noe Orozoco!
•
•
If he trains in a hot day: when he swims he doesn’t drink anything during the swim,
when he runs for a hour he has a medium bottle of water and when he cycles for let’s
say three or four hours, he drinks a bottle of water and another bottle of energy drink
like Gatorade.
•
When he doesn’t train and only uses his bike to do everyday activities, he burns around
2,700 calories but in a long training day for example 4 hour in the bike and right after 2
hours more of running in a spring day that would be around 4,200 Cal. That’s ALOT of
calories!
In a normal spring day of no training day he drinks water and diluted fruit juices and cordials, maybe
5 litres of liquids in total. He doesn’t drink either coffee or tea, because his body doesn’t like them.
That's 5 whole Apple Juice Cartons!!!!
Now Noe is a tri-athlete, he eats more nuts (all the different types), more salt, much more water,
carbohydrates, more fruits and more good fats.
Pasta, rich in
Carbohydrates.
Fruit!
Water!
Hazelnuts!
Salt!
Peanut Bar!
Noe eats a lot of snacks, because his body type burns food very quickly and his training needs lots of
energy so he can be the fastest he can! Usually he has apple, bananas, dates, cashew nuts,
almonds, or peanut bars. Yummy!
Athletes’ diet quiz
What should an athlete eat:
will it be Quavers?
Have you been
watching carefully?
Test yourself on these
challenging questions.
A
Muesli
B
Full English Breakfast.
C
Pancakes.
A
B
C
.
Cheese sandwich with
salad
Chicken sandwich with
mayonnaise
MC Donald's
A
Sunday roast
B
C
Pasta with cheese
Fish and chips
Wolvercote Primary School
Year 5/6 Science club
Daniel Oosthuizen, Ilana Cope, Laura Goddard,
Lotte Ree, Eleanor Ivimey-Parr, Zulfi Heydon,
Muha Karliyev, Ben Cornell, Isobel Robertson,
May Rainbird, Chelsea Hsaio, Chih-Fang Hsu