This document discusses the different stages of human life from birth to old age. It then covers healthy habits like eating a varied diet, exercising, hygiene, rest, and posture. It also mentions common illnesses like colds and flu. The next section is about nutrients like proteins, vitamins, carbohydrates, and fat. It concludes with an activity involving completing sentences about the food pyramid.

1. UNIT 3
NATURAL SCIENCES

2. STAGES OF LIFE

3. BABY
• A baby is born after spending 9 months inside
the womb.

4. CHILDHOOD
• Children learn to read, walk and talk. Between
1 and 12 years old.

5. TENEGEERS
• Humans begin to develop physically. Between
12 and 18 years old.

6. YOUNG
• Your body is fully developed. Between 18 and
25 years old.

7. ADULTHOOD
• Your body is fully developed. Between 25 and
65 years old.

8. OLD AGE or ELDERLY
• The last stage in the life cycle of a human.
From 65 years old to the end of the life.

9. ACTIVITIES
1.- Write a sentences with each stage of life.
Example: Marcos is young.
2.- Match each age with their stage.
15 Years old. Old age.
7 Years old. Childhood.
78 Years old. Tenegeers.
3 Months. Adulthood.
53 Years old. Baby.

10. ACTIVITIES
• 3.- Listen the sentences and write the stage
of life.
Example: My brother is 31 years old.

11. HEALTH AND ILLNESS
• The secret to a healthy lifestyle is to have
healthy habits.

12. HEALTHY HABITS
• A healthy diet. Eat a varitey food every day.

13. HEALTHY HABITS
• Exercise: Do physical exercise to keep your
body fit, strong and flexible.

14. HEALTHY HABITS
• Hygiene: Wash your HANDS before meals and
brush your teeth afeter meals.

15. HEALTHY HABITS
• Rest: Sleep for around 9 or 10 hours a day.

16. HEALTHY HABITS
• POSTURE: Sit upright in your chair and lean
back against the support.

17. ILLNESS
• Cold
• Flu
• Chicken pox

18. ACTIVITIES
• 1.- (Speaking) Discuss with your partner which
of the healthy habits your have.
• 2.- Match the symptoms to the healthy habits.
– Sleep for around 9 or 10 hours.
– Wash your hands before meals.
– Eat a variety of food every day.
– Sit upright in your chair and lean back against the
support.
– Do physical exercise to keep your body fit, strong
and flexible.

19. ACTIVITIES
• 3.- Listen and write the healthy habits.

20. KINDS OF NUTRIENTS
• Proteins. They five our body the nutrients it
needs for growth and repair.

21. KINDS OF NUTRIENTS
• Vitamins and minerals. Prevent illness.

22. KINDS OF NUTRIENTS
• Carbohydrates. They give our body the energy
it needs to stay active

23. KINDS OF NUTRIENTS
• Fat. They can be dangerous. BE CAREUFUL!

24. THE FOOD PYRAMID

25. ACTIVITIES
• 1.- Complete the sentences.
Fat; Proteins; Vitamins; carbohydrates.
– Fish are ___________
– This pork is _________
– These bananas are__________
– We should eat every day _________ and
________