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:

• StarchAnimals store extra energy as:

• 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 Fat5 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 TableFood Grams

per servingCalories

per servingCaloriesPer gram

Calories per 100 grams

Cake

Soup

Cereal

Muffins

Chicken Stew

Pizza

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?

Type of food

Calories per 100 grams