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ANALYSIS

NB- Come back and use South African examples for the model answer examples

Examine the data you collected when making your ABC profile. Use your collected data to answer the following questions.

1. What effect does the environment (abiotic) have on the organisms (biotic) living there? Give FIVE specific examples from your profile. [For example: Lily pads (biotic) are able to grow in my area because it is a natural wetland that has standing, stagnant water (abiotic) all year long.]

2. What effect do the organisms (biotic) have on the environment (abiotic)? Give THREE specific examples from your profile. [For example: The area is heavily shaded by spruce trees (biotic). The shade keeps the soil moist (abiotic) and reduces the air temperature.]

3. How do natural forces affect the area? Give ONE specific example from your profile. Consider the direction of the prevailing winds, the direction from which the sun’s rays come, gravity (if you are on a slope), etc…

4. How have humans affected your area? Give ONE specific example.

5. Predict how your area would change if the amount of rainfall doubled. Be sure to mention how this increase in rainfall would affect the abiotic and bioticfactors.

Questions

Question 1

Read the following text and answer the questions that follow :

South Africa has offered to slow the growth of its greenhouse gas emissions by 34% by 2020. The biggest producers of greenhouse gases in South Africa areEskom, the producers of electricity, and Sasol, the producers of petrol and diesel from fossil fuels.

1.1.Which is the most important greenhouse gas?(1)

1.2.Explain why Eskom and Sasol produce the most greenhouse gases. (2)

1.3.You are a scientist who has been employed by the government to check that the target is reached. Briefly explain the methodology you would use to dothis. (3)

1.4.Suggest two strategies that Eskom and Sasol could use to reduce their greenhouse gas emissions. (2)

Question 2

Study the table below on ozone depletion and answer the questions that follow:

Amount of ozone depletion of stratosphere between 1982&1996

Year Ozone depletion (in tons)
1982 2000
1984 3000
1986 4000
1988 3500
1990 6000
1992 7000
1994 8000
1996 7000

2.1.Comment on the ozone depletion during the period 1982 to 1996.(2)

2.2.How much of the ozone was lost from the stratosphere in 1990? (1)

2.3.CFC's can stay around for about 100 years. What is the implication of this for the ozone layer? (1)

2.4.Give ONE possible reason for the decrease in ozone depletion after 1994.(2)

Question 3

The dying of trees due to acid rain is brought about by changes in the pH of thesoil. Tshepo observed that trees in his town were gradually dying. He decided to investigate the effect of acid rain on germinating bean seeds. He did thefollowing:

  • Placed cotton wool on 6 saucers
  • Poured a solution with a different pH (varying from pH 2 to pH 7) onto the cotton wool in each saucer
  • Placed 50 bean seeds onto the cotton wool in each saucer
  • Covered the seeds and left them on the shelf for a week
  • The following results were obtained:

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
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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