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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

what is mutation
Janga Reply
what is a cell
Sifune Reply
how is urine form
Sifune
what is antagonism?
mahase Reply
classification of plants, gymnosperm features.
Linsy Reply
what is the features of gymnosperm
Linsy
how many types of solid did we have
Samuel Reply
what is an ionic bond
Samuel
What is Atoms
Daprince Reply
what is fallopian tube
Merolyn
what is bladder
Merolyn
what's bulbourethral gland
Eduek Reply
urine is formed in the nephron of the renal medulla in the kidney. It starts from filtration, then selective reabsorption and finally secretion
onuoha Reply
State the evolution relation and relevance between endoplasmic reticulum and cytoskeleton as it relates to cell.
Jeremiah
what is heart
Konadu Reply
how is urine formed in human
Konadu
how is urine formed in human
Rahma
what is the diference between a cavity and a canal
Pelagie Reply
what is the causative agent of malaria
Diamond
malaria is caused by an insect called mosquito.
Naomi
Malaria is cause by female anopheles mosquito
Isaac
Malaria is caused by plasmodium Female anopheles mosquitoe is d carrier
Olalekan
a canal is more needed in a root but a cavity is a bad effect
Commander
what are pathogens
Don Reply
In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is anything that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s.[1][2
Zainab
A virus
Commander
Definition of respiration
Muhsin Reply
respiration is the process in which we breath in oxygen and breath out carbon dioxide
Achor
how are lungs work
Commander
where does digestion begins
Achiri Reply
in the mouth
EZEKIEL
what are the functions of follicle stimulating harmones?
Rashima Reply
stimulates the follicle to release the mature ovum into the oviduct
Davonte
what are the functions of Endocrine and pituitary gland
Chinaza
endocrine secrete hormone and regulate body process
Achor
while pituitary gland is an example of endocrine system and it's found in the Brain
Achor
what's biology?
Egbodo Reply
Biology is the study of living organisms, divided into many specialized field that cover their morphology, physiology,anatomy, behaviour,origin and distribution.
Lisah
biology is the study of life.
Alfreda
Biology is the study of how living organisms live and survive in a specific environment
Sifune
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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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