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Natural sciences

Grade 8

Biodiversity

Module 24

Fossils

Fossils are the remains of dead plants, animals, bacteria and other life forms that lived millions of years ago and were then petrified.

Fossils are the petrified remains of organisms, e.g. teeth, bones, bark or shells. They may also be the tracks or waste products of organisms.

1. When an animal or organism dies, the soft parts decay first. The rest is buried below the sand or in mud.

2. Over millions of years, chemical changes and the intense pressure of overlying layers result in the petrification of these remains.

3. Water that seeps through such remains also effects changes. Petrified forms are retained very well.

4. Movement of the earth plates brings fossils to the surface.

Activity: to do research on the forming of fossils

What is a palaeontologist?

What does SA law say about fossils? www.ru.ac.za/pssa/pssalaw.html

Assignment: draw a flow diagram to illustrate the process by which fossils are formed.

Assessment of the flow diagram:

Were you able to draw a meaningful flow diagram of the fossilisation process?

[ LO 2.2]

Adaptations – Fossils

Activity: to interpret information

Study the following sketches of fossils and try to make deductions concerning their feeding and locomotion:

Skull of a primitive amphibian

Brachiopod shells in a 500 – 300 million year-old marine deposit

Skull of a South African dinosaur ( Mossospondylus )

A fly found in the 90 million years old deposits of the Orapa diamond crater (Botswana)

Assessment of deduction:

Could you make correct deductions from the pictures of fossils?

[ LO 2.3]

Assessment

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

  • is able to categorise information
  • is able to interpret information

Memorandum

Class activity: SKETCHES of FOSSILS

  • Find sources of information on fossils, palaeontologists and excavations.
  • www.ru.ac/za/pssa/pssalaw.hrml - fossils and SA law

Questions & Answers

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
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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
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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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