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Calories and Serving Sizes

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Calories and Serving Sizes

Healthy food and nutrition labels

📚 Part 1: Understanding Calories and Serving Sizes

1. What is a calorie?

A type of vitamin

A unit of energy from food

A measurement of food weight

A type of nutrient

2. How many kilojoules are in 1 calorie? (approximately)

2.2 kJ

4.2 kJ

6.2 kJ

8.2 kJ

3. Which factors affect how many calories a person needs per day? (Select all that apply)

Age

Physical activity level

Height and weight

Favourite colour

Gender

4. A nutrition label shows "Per 100g: 1200 kJ". If you eat 50g of this food, how many kilojoules do you consume?

Answer: _____________ kJ

🥗 Part 2: Calculating Serving Sizes

5. A packet of biscuits contains 8 biscuits and has 2400 kJ total. How many kilojoules are in 3 biscuits?

Answer: _____________ kJ

6. Look at this nutrition information for breakfast cereal:

Per 30g serve with 125ml milk: 650 kJ

Per 100g cereal only: 1500 kJ

a) If you have a 45g serve of cereal with milk, how many kilojoules would that be?

Answer: _____________ kJ

b) How many kilojoules come from the milk alone in a standard 30g serve?

Answer: _____________ kJ

7. A teenager needs approximately 8500-10,500 kJ per day. If breakfast provides 1800 kJ, what percentage of daily energy needs does this represent?

Answer: Between _____% and _____%

🍎 Part 3: Making Healthy Choices

8. Compare these two snack options and explain which is the better choice for an active teenager:

Option A: 1 apple (300 kJ) + 30g nuts (800 kJ)

Option B: 1 chocolate bar (1100 kJ)

9. List three strategies for controlling portion sizes when eating:

1. _________________________________________________

2. _________________________________________________

3. _________________________________________________

10. Explain why it's important to read nutrition labels when choosing foods:

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