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Natural sciences

Grade 8


Module 22

Life on earth

All plants and animals are divided into groups according to their characteristics. Can you remember what we call the process by which this division is performed?


  • Test your memory:
  • Animals are divided into TWO main groups according to the presence or absence of a
  • Animals that do not have an internal skeleton are known as
  • Animals with an internal skeleton are known as
  • Vertebrates are divided into

Activity: to classify information

  • Cut out the pictures on this page and paste them on another sheet of paper under the propriate heading (Fish, Amphians, Reptiles, Birds, Mammals ). List three external features of each group. (Remember that features may not be visible in the pictures.)

Fish eagle Haliaeetus vocifer

Rhinoceros Diceros bicornis

Leguan Varanus niloticus

Common frog Rana temporia

Common carp Cyprinus carpio

Assessment of classification:

Could you apply the sketches correctly and list the correct features?

[ LO 2.2]

The classification of living organisms is performed according to an international system designed by scientists. This makes it possible for people from all language groups and from all over the world to know precisely which organism is meant when information is offered or received.

Carl Linnaeus (1707-1778), a Swedish doctor, botanist and zoologist, has had the most important influence on our present classification system.

  • Names given to organisms are mainly of Latin origin (so it is “Greek” to most of us).
  • Each organism bears a "NAME" and a "SURNAME".
  • The name represents the species – it refers to similarities in structure, function and reproduction potential (the chromosome number is the same).
  • The surname represents the Genus – it indicates a group of related species.
  • The rule for writing this has INTERNATIONAL validity.
  • The Genus name is written first and with an initial capital letter followed by lower case letters.
  • This is followed by a space and the species name, using lower case letters throughout.
  • If the name is printed, italic script is used. In hand-written format, the two words are underlined separately.
  • The scientific name of the earthworm, for instance, is Lumbricus terrestris.
  • This system is referred to as a BINOMINAL system (two names).

Activity: to apply a simple classification system

1. What is a biologist?

2. What is a botanist?

3. Write the scientific name of the earthworm according to the international rule:

4. Why is classification important?

5. What is the meaning of terre in the scientific name of the earthworm?.

6. Use of the information provided on the page of sketches and write the scientific name in one column and the common name in another column.

7. Examine the names of the different robins (birds)

  • Chorister robin: Cossypha dichroa
  • Heuglin’s robin: Cossypha heuglini
  • Natal robin: Cossypha natalensis
  • Cape robin Cossypha caffra
  • Explain the meaning of the Genus and the species names as in the binominal classification system with reference to these names.

Assessment of APPLICATION:

Could you answer the questions?

[LO 2.4]


  • Do research on Carl Linnaeus as a scientist. Write a report of approximately 100 words.


Learning outcomes 1: Scientific investigations

The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

This is evident when the learner

1.2 is able to conduct an investigation and collect data.

Learning outcomes 2: Constructing Science Knowledge

The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

This is evident when the learner

  • able to categorise information;

2.4 is able to apply knowledge.



  • Explain classification and the binominal system.
  • Sources dealing with Carolus Linnaeus.

Questions & Answers

who was the first nanotechnologist
Lizzy Reply
technologist's thinker father is Richard Feynman but the literature first user scientist Nario Tagunichi.
Norio Taniguchi
I need help
anyone have book of Abdel Salam Hamdy Makhlouf book in pdf Fundamentals of Nanoparticles: Classifications, Synthesis
Naeem Reply
what happen with The nano material on The deep space.?
pedro Reply
It could change the whole space science.
the characteristics of nano materials can be studied by solving which equation?
sibaram Reply
plz answer fast
synthesis of nano materials by chemical reaction taking place in aqueous solvents under high temperature and pressure is call?
hydrothermal synthesis
how can chip be made from sand
Eke Reply
is this allso about nanoscale material
are nano particles real
Missy Reply
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
where is the latest information on a no technology how can I find it
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
has a lot of application modern world
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
STM - Scanning Tunneling Microscope.
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Source:  OpenStax, Natural sciences grade 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11050/1.1
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