1. Natural Sciences Grade 7
Term 1: Life and Living
Biodiversity
(PPT 1)

2. Classification of Living Organisms
Topic 2 Biodiversity
Classification of Living Organisms
Gr 7 Natural Sciences - Term 1, Topic 2

3. Classification systems
We classify objects when we group them with similar objects.
This makes it easier for us to make sense of the world around us.
We group things all the time:
for example, kitchen utensils are grouped
into cutlery, plates, bowls and pots.
Gr 7 Natural Sciences - Term 1, Topic 2 3

4. Classification of Living Organisms
Biologists sort living organisms into groups to make it easier to study them.
Grouping of living organisms is called biological classification.
Living organisms are divided into five main groups called KINGDOMS.
These are the bacteria, protists, fungi, plants and animals.
Gr 7 Natural Sciences - Term 1, Topic 2 4

5. Gr 7 Natural Sciences - Term 1, Topic 2
Biodiversity on Earth
Each Kingdom is very large and it contains many different types of organisms.
This pie chart shows the number of different animal species in each of the Kingdoms.
Gr 7 Natural Sciences - Term 1, Topic 2 5

6. Gr 7 Natural Sciences - Term 1, Topic 2
Meet Carl Linnaeus
Gr 7 Natural Sciences - Term 1, Topic 2 6

7. Gr 7 Natural Sciences - Term 1, Topic 2
Who was he?
Famous for his work in Taxonomy: the science of identifying, naming and classifying organisms (plants, animals, bacteria, fungi, etc.).
He was born in 1707 in Råshult, Sweden.
He was the eldest of five children.
His father, Nils, was a minister and a keen gardener.
Gr 7 Natural Sciences - Term 1, Topic 2 7

8. Seven Level Classification System
He used seven groups or taxonomic levels Kingdom Phylum Class Order Family Genus Species
The broadest level
The most specific level
Gr 7 Natural Sciences - Term 1, Topic 2 8

9. Each Kingdom can be divided into smaller groups.
Gr 7 Natural Sciences - Term 1, Topic 2 9

10. Each Kingdom can be divided into smaller groups.
Phylum /
Gr 7 Natural Sciences - Term 1, Topic 2 10

11. Each Kingdom can be divided into smaller groups.
Phylum
Class
Gr 7 Natural Sciences - Term 1, Topic 2 11

12. Each Kingdom can be divided into smaller groups
Phylum
Class
Family
Each Kingdom can be divided into smaller groups
Gr 7 Natural Sciences - Term 1, Topic 2 12

13. Each Family can further be divided into smaller groups
Order
Gr 7 Natural Sciences - Term 1, Topic 2 13

14. Each Family can further be divided into smaller groups
Order
Genus
Gr 7 Natural Sciences - Term 1, Topic 2 14

15. Each Family can further be divided into smaller groups
Order
Genus
Species
Gr 7 Natural Sciences - Term 1, Topic 2 15

16. Classification of the cats and dogs
Gr 7 Natural Sciences - Term 1, Topic 2 16

17. Classification of the cats and dogs
Gr 7 Natural Sciences - Term 1, Topic 2 17