grade 10 2017 examination 10... · web viewa single word or two that appears in any official...

MARKS: 150

This marking guideline consists of 11 pages

PRINCIPLES RELATED TO MARKING LIFE SCIENCES

1. If more information than marks allocated is given

Stop marking when maximum marks is reached and put a wavy line and ‘max’ in the right-hand margin.

2. If, for example, three reasons are required and five are given

Copyright reserved Please turn over

NATIONAL

SENIOR CERTIFICATE

GRADE 10

LIFE SCIENCES PAPER 2

MARKING GUIDELINESNOVEMBER 2017

Life Sciences P2/Grade 10 2 LimpopoDoE/November 2017NSC- Marking guidelines

Mark the first three irrespective of whether all or some are correct/incorrect

3. If whole process is given when only part of it is required

Read all and credit relevant part.

4. If comparisons are asked for and descriptions are given

Accept if differences/similarities are clear.

5. If tabulation is required but paragraphs are given

Candidates will lose marks for not tabulating.

6. If diagrams are given with annotations when descriptions are required

Candidates will lose marks

7. If flow charts are given instead of descriptions

Candidates will lose marks.

8. If sequence is muddled and links do not make sense

Where sequence and links are correct, credit. Where sequence and links are incorrect, do not credit. If sequence and links become correct again, resume credit.

9. Non-recognised abbreviations

Accept if first defined in answer. If not defined, do not credit the unrecognised abbreviation but credit the rest of answer if correct.

10. Wrong numbering

If answer fits into the correct sequence of questions but the wrong number is given, it is acceptable.

11. If language used changes the intended meaning

Do not accept.

12. Spelling errors

If recognisable accept provided it does not mean something else in Life Sciences or if it is out of context.

13. If common names given in terminology

Accept provided it was accepted at the national memo discussion meeting.

14. If only letter is asked for and only name is given (and vice versa)

No credit.

15. If units are not given in measurementsCandidates will lose marks. Memorandum will allocate marks for units separately.

16. Be sensitive to the sense of an answer, which may be stated in a different way.



17. Caption

All illustrations (diagrams, graphs, tables, etc.) must have a caption.

18. Code-switching of official languages (terms and concepts)

A single word or two that appears in any official language other than the learners’ assessment language used to the greatest extent in his/her answers should be credited, if it is correct. A marker that is proficient in the relevant official language should be consulted. This is applicable to all official languages.

19. No changes must be made to the marking memoranda without consulting the Provincial internal moderator.



SECTION A

QUESTION 1

1.1

1.1.1 C

1.1.2 A1.1.3 B1.1.4 D1.1.5 A1.1.6 B1.1.7 C1.1.8 D1.1.9 B1.1.10

D (10 x 2)

(20)

1.2

1.2.1 Deductive reasoning / Inference

1.2.2 Systole1.2.3 Prokaryotes1.2.4 Capillary1.2.5 Binomial System1.2.6 Amber1.2.7 Pangea1.2.8 Artery1.2.9 Coelacanth1.2.10

Saprophytes /saprotrophic (10 x 1)

(10)

1.3

1.3.1 G

1.3.2 D1.3.3 F1.3.4 E1.3.5 B1.3.6 C 1.3.7 A

(7 x 2)(14)

1.4.1 (a) B

(1)

(b) A(c) Oxygen

(1)(1)



(d) Carbon dioxide(1)

1.4.2 Breakdown dead matter and return the componets of dead matter to the environment.

(2)

(6)TOTAL SECTION A: (50

)

SECTION BQUESTION 2

2.12.1.1 (a) Palaeomastodon

(b) 38mya / Eocene(c) Shorter trunk Smaller in size small tusks

2.1.2 Loxodonta2.1.3 African elephant2.1.4 10 000 years ago2.1.5 YesLack of suitable habitats / threatened by poaching for ivory

tusks/meatOR

No Many conservation parks established. Elephants monitored and protected from poachers/ Overpopulation

of elephants have to be controlled by culling/relocating.

2.2 - Pollution, making resources unusable for living organisms

- Habitat destruction changing habitat so that living organisms have no place to live.

- Overpopulation of human,humans clearing land for housing

- Unsustainable hunting,killing many animals that many rely on,

(Mark first THREE) Any 3x2

2.32.3.1 Gauteng2.3.2 Homo naledi

(1)(1)(2)(1)(2)(2)(2)

(6)

(17)

(1)(1)

2.3.3 - Relative dating- Radiometric dating

(2)

2.3.4 - It provide evidence of earlier life on earth- Give information regarding the history of life on

earth- Give indications of the climate and the environment

of million years ago Mark first 2 only Any 2

(2)



2.3.5 Sedimentary rock (1)

2.3.6 - Ice- Pits of tar- Sap of trees( amber)

Mark first 2 only Any 2

(2)

2.3.7 - Most land animals do not die in sediments and therefore do not form fossils

- Unfavourable condition preventing fossilisation- Soft bodies organisms, never fossilise

Mark first 1 Any 1

(1)

2.3.8 The plant or animal die It is rapidly covered with sediment Soft tissue decay, hard parts such bone or shells

remains intact as the organic material is hardened. More layers of sediment form over hundreds of

years. Sediment is cemented together and layers

compressed. Sediment solidifies and form sedimentary rock.

Any 5

(5)

(15)

2.4

2.4.1

The graph showing number of deaths per 1000 caused by heat diseases from 1970 to 2010 (over time)

1970 1980 1990 2000 20100

100

200

300

400

500

600500

450

300260

200

Year

Num

ber o

f dea

ths

per 1

000


T P

L S

C


Check list for the mark allocation of the graphCreteria MarkCorrect type of graph (T) Title/caption of graph (C) Correct label for X-axis and Y axis (L)

Correct scale for X-axis and Y-axis (S)

Plotting (P) 1 to 4 point plotted correctlyAll 5 point plotted correctly

NOTE:

If the wrong type of graph is drawn:- Marks will be lost for 'correct type of graph'If axes are transposed:

- Marks will be lost for labelling of X-axis and Y-axis

2.4.2

- Access to medication- People becoming aware of preventive measures- People are educated

Mark first 2 Any 2(2)(8)

TOTAL QUESTION 2(40)

QUESTION 3

3.1.1 To determine the effect of temperature on the growth of cucumber (1)3.1.2 0°C (1)3.1.3 Average growth/ yield (1)3.1.4 Soil type and light intensity (2)3.1.5 - When the temperature was low, the growth was slow

- As the temperature increases(from 10 to 20) the growth increases- From 20 to 40 the growth decreases

Mark first TWO (4) (11)

3.2

3.2.1

It has 8 500 different plant species (2)

3.2.2

- Poor land management- Mining- Dam construction- Conversion of marginal lands for cultivation- Illegal extraction of selected succulents for black market

trade (3)



MARK FIRST THREE Any 3

3.2.3

8500×70/100=5950 species (3)

3.2.4

(a)

Hot in summer and cold in winter (2)

(b)

Sandy soil with moderate amount of nutrients (1)

3.2.5

- Educate local people about conservation- Creating protected area/ nature reserve for plants

and animals, where human activity is limited- Preventing introduction of alien species- Punish those who violate nature conservation laws- Create laws to protect nature

Mark any THREE Any 3

(3)

(14)

3.3

3.3.1

(a) 1 – Aorta (1)

(b) 4 - Pulmonary vein (1)

(c) 6 – Right ventricle (1)

3.3.2

2 (1)

3.3.3

Prevents blood from flowing back into the left atrium when the left ventricle contract. (1)

3.3.4

It is a system where the blood never leaves the blood vessels

(1)

3.3.5

Arteries Vein

- Thick-walled / because middle smooth muscle layer is thick

- No valves (except those in the heart)

- Thin- walled / because middle smooth muscle layer is thinner

- Valve present

Table

Mark first 2 Any 2 + 1 table(5)



3.3.6

- Part labelled 5 (left ventricle) needs more pressure - to pump blood to all parts of the body while part- labelled 6 (right ventricle) requires less pressure- to pump blood to the lungs.

Any 3 (3)

3.3.7

- Heart attack/ heart disease- Hypertension/ high blood pressure- Hypotension /low blood pressure)- Stroke

Mark first ONE Any 1

(1)

(15)

TOTAL QUESTION 3 40

TOTAL SECTION B: 80

SECTION C

QUESTION 4

What is ecotourism?The type of tourism where the visitor, local community and environmentbenefitsfrom attractions in ecologically sensitive areas (2)

Economical benefits of ecotourism- Visitors enjoy the natural beauty of the environment- Creates job opportunities for locals- Creates business opportunities- It contributes to the land’s economy- Promotes public knowledge and awareness of environmental issues. - Some of the money obtained from ecotourism could be used to build more

protected areas such as nature reserves. - Reduce animal poaching and protect the threatened species with

extinction. - More of the environment become protected- Money received may be used to rehabilitate biodiversity in the

environmentAny 6 (6)

Ethics- Some tourist operators simply use the public interest in the environment

topromote their businesses

- Such kind of operators show little concern for the environment.



- Local people especially women, are employed mostly at the lowest level andmost poorly paid jobs.

- Accommodation and catering facilities for tourists and curio shops are run byhuge companies, many of which may be owned by people based

outsidethe country. Little or no income from these aspects of the ecotourismindustry goes to the local people.

- No attempts are made to include, in their tourism programs, exploration andappreciation of the cultures of the local people.

- Little or no attempts are made to ensure that their own tours and relatedactivities have the lowest possible negative impact on the environment.

- Little or none of their profits are used for activities that protect thebiodiversity.

Any 6 (6)Opportunities of ecotourism

- Offers opportunities to learn different cultures and customs-Offers educational opportunities to local communitiesInfrastructure development for local communities

Content :17Synthesis:3

TOTAL QUESTION 4: [20]TOTAL :150

ASSESSING THE PRESENTATION OF THE ESSAY

Criterion Relevance Logical sequence Comprehensive

Elaboration

All information provided is relevant to the topic.

Ideas are arranged in a logical/cause-effect sequence.

All aspects required by the essay have been addressed.

Mark 1 1 1

Paper 2 Only information regarding ecotourism, econimical benefits, ethics and opportunities

Ecotourism presented in a logic sequence.

At least 2 facts regarding ecotourism (3/6) on economical benefits, 3/6 on ethics, and (3/6)on opportunities

TOTAL SECTION C: 20

GRAND TOTAL: 150


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