This document discusses the three vital functions of animals: nutrition, interaction, and reproduction. It classifies animals into vertebrates, which have a skeleton, and invertebrates, which do not. Vertebrates are divided into five groups and have a head, trunk, and extremities, while invertebrates are divided into six groups. It includes questions to test understanding of these classifications and asks students to complete an activity classifying example animals and to write about their favorite animal in a journal.

1. 3 R D O F P R I M A R Y
NATURAL SCIENCE
UNIT 1 – PART 1

2. THE THREE VITAL FUNCTIONS
• NUTRITION: eating
• INTERACTION: reacting with the
environment
• REPRODUCTION: to have a new baby

3. CLASIFICATION OF ANIMALS
• VERTEBRATES: They have skeleton
• INVERTEBRATES: They don’t have skeleton

4. VERTEBRATES
• They have HEAD, TRUNK, EXTREMITIES

5. VERTEBRATES
There are five groups:

6. INVERTEBRATES
• They don’t have skeleton
• There are 6 groups

7. VERTEBRATES AND INVERTEBRATES

8. QUESTIONS
• In which vital function the animals eat?
• In which vital function a cat can have a baby cat?
• In which group are the animals with skeleton?
• In which group of vertebrates is a snake?
• In which group of vertebrates is a dog?
• In which group of vertebrates is a chicken?
• In which group of invertebrates is a butterfly?

9. ACTIVITIES
• 1. Classify these animals in vertebrates or
invertebrates:
SPIDER – LION – HORSE – BEE – BUTTERFLY – DOG – BIRD – CHICKEN -
LADYBIRD
VERTEBRATES INVERTEBRATES

10. JOURNAL
•What is your favourite animal? Why?
Draw a picture of it.