Calories
What is a calorie?
• A unit of energy
• The amount of heat energy required
to raise the temperature of 1 g of
water by 1°C
Food Calories
• Food is given caloric value to suggest
the amount of potential energy the
food has
– Carbohydrates  4 calories/gram
– Proteins  4 calories/gram
– Lipids (fats)  9 calories/gram
Calories are GOOD!
• Does your body need energy?
• Does your body need calories?
• Can your body use more than 100% of
the calories it needs?
Energy storage: Plants vs. Animals
Plants store extra energy as:
Animals store extra energy as:
• Starch
• Fats!
More is not always better
• 3,500 extra calories is stored by your
body as 1 pound of fat
– So, if you gain 10 pounds (of fat) you
have eaten 35,000 calories more than
your body needs to survive
– That’s 59 Big Macs!!!!!
Human Fat
5 pounds
1 pound
November BIN
• Obese people are at a higher risk of
developing Type 2 Diabetes
• Prevent obesity related Type 2 Diabetes
by limiting your calorie intake
• Fewer calories = less fat production =
smaller risk of developing Type 2
Diabetes!!!!
Calorie Lab – pg 56
• Find serving size and and calories for
each label
• Calories per gram = calories per serving
serving size (g)
• Find calories per 100 grams
– Multiply by 100
Data Table
Food
Cake
Soup
Cereal
Muffins
Chicken Stew
Pizza
Grams
per serving
Calories
per serving
Calories
Per gram
Calories
per 100
grams
Designing a graph
• X axis = independent variable
• Y axis = dependent variable
• Use units!!!!!
How do you know what kind
of graph to use?
Line Graph
• Used to show trends
Bar Graph
• Used to make comparisons
What kind of graph will we make?
Calories per
100 grams
Type of food