<< Chapter < Page Chapter >> Page >

Natural sciences

Grade 8

Biodiversity

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?

Classification

  • 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]

ASSIGNMENT [LO 1.2]:

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

Assessment

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.

Memorandum

Activity: APPLICATION OF CLASSIFICATION

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

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natural sciences grade 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11050/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natural sciences grade 8' conversation and receive update notifications?

Ask