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The scientist finds some igneous rock which he assumes to be the same age as the sedimentary rock in which the fossil was found.

The scientist measures the ratio of parent to daughter elements in this igneous rock.

The scientist concludes the age of the igneous rock, as previously explained.

The scientist concludes the age of the fossil from the age of the igneous rock.

Link to movie: Fossil dating 6’14”

<iframe width="425" height="349" src="http://www.youtube.com/embed/K5GWSbBkjuk?hl=en&fs=1" frameborder="0" allowfullscreen></iframe>

Caption: This is a 6’14” video in which radiometric dating is explained.

Fossil tourism

South Africa has a number of fossil-rich areas which attract tourists. The Cradle of Mankind (Maropeng, Sterkfontein, Kromdraai and surrounding areas) andLangebaan are examples of places in South Africa which attract fossil tourism.

Maropeng is a Tswana word for the origin of mankind.

Living fossils

Many creatures which disappeared from the fossil record millions of geological years ago have been found to be alive still and almost identical to theirfossilized counterparts.

There are many examples of living fossils. The Tuatara, which looks like a lizard with a beak-shaped head, disappears from the record 135 milliongeological years ago, but is still alive. Lingula, a worm-like creature which disappears from the record about 400 million years ago, not very far from thebeginning of metazoan evolution, is still alive and shows no sign of significant evolution from its fossilized ancestors. This suggests that we maybe interpreting the fossil record incorrectly, and our conclusions based on it may be wrong.

Activity: fossils

1.Name / give the term for:

  • Turning to stone
  • A fossil in which the surroundings became stone, leaving a cavity where the body had been
  • The time period and era, according to the geological column, when dinosaurs first appeared
  • The time period and era, according to the geological column, when dinosaurs became extinct
  • A person who studies fossils
  • A person who studies rocks
  • Layers of deposited material
  • No members of that organism exist anymore
  • The time era, according to the geological column, when mankind evolved

2.For each of the following sentences, say whether the information is: (Circle i / ii / iii)

  • Accepted by definition if people have defined this to be so, or
  • Known by observation if people have observed this to be so, or
  • Deduced if people have come to this knowledge by reasoning.

  • During petrifaction, minerals enter, harden, and turn a body to stone.[ i / ii / iii]
  • The Triassic Period is more recent than the Permian Period. [ i / ii / iii]
  • The oldest fossils are 650 million years old. [ i / ii / iii]
  • A film fossil is a carbon mark left on rock e.g. by leaves. [ i / ii / iii]
  • The deepest rocks with reptile fossils are classed as Carboniforous. [ i / ii / iii]
  • Reptiles first evolved 350 million years ago, at the start of the Carboniforous period. [ i / ii / iii]
  • Only 2/3 of all types of organisms which have ever lived have left any fossils.[ i / ii / iii]

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
why and for what was five kingdom of classification of organisms introduced
SUBHIKSHA Reply
give the ans as fast as possible
SUBHIKSHA
Comment on the ozone depletion over the period of 1982 to 1996
Mpho Reply

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Source:  OpenStax, Siyavula: life sciences grade 10. OpenStax CNX. Apr 11, 2012 Download for free at http://cnx.org/content/col11410/1.3
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