LIFE SCIENCES P2 MOTHEO DISTRICT GRADE 10 - Grey College
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MOTHEO DISTRICT
GRADE 10
LIFE SCIENCES P2
NOVEMBER 2019
TOTAL: 150
TIME: 2½ HOURS
This question paper consists of 15 pages.
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Life Sciences P2 2 FS/Motheo District/Nov 2019
Grade10
INSTRUCTIONS AND INFORMATION
Read the following instructions carefully before answering the questions.
1. Answer ALL the questions.
2. Write ALL the answers in the ANSWER BOOK.
3. Start the answers to EACH question at the top of a NEW page.
4. Number the answers correctly according to the numbering system used in this
question paper.
5. Present your answers according to the instructions of each question.
6. Make ALL drawings in pencil and label them in blue or black ink.
7. Draw diagrams, tables or flow charts only when asked to do so.
8. The diagrams in this question paper are NOT necessarily drawn to scale.
9. Do NOT use graph paper.
10. You must use a non-programmable calculator, protractor and a compass,
where necessary.
11. Write neatly and legibly.
Copyright reserved Please turn overLife Sciences P2 3 FS/Motheo District/Nov 2019
Grade10
SECTION A
QUESTION 1
1.1 Various options are given as possible answers to the following questions. Choose
the answer and write only the letter (A to D) next to the question number (1.1.1 to
1.1.10) in the ANSWER BOOK, for example 1.1.11 D.
1.1.1 The part of the biosphere which consists of land is known as the …
A terasphere.
B atmosphere.
C hydrosphere.
D lithosphere.
1.1.2 Organisms that become inactive during winter are said to …
A aestivate.
B hibernate
C migrate.
D insulate
1.1.3 A sea can be regarded as a (an) … biome.
A aquatic
B terrestrial
C freshwater
D desert
1.1.4 Which of the following is NOT associated with the lymphatic system?
A Low pressure
B Hugh concentration of metabolic waste
C Transports digested fats
D High oxygen concentration
1.1.5 Which of the following combinations of soil types shows an increase
in water holding capacity from lowest to highest?
Lowest water Highest water
holding capacity holding capacity
A sand clay loam
B clay sand loam
C sand loam clay
D clay loam sand
Copyright reserved Please turn overLife Sciences P2 4 FS/Motheo District/Nov 2019
Grade10
1.1.6 During the carbon cycle, carbon dioxide is removed from the
atmosphere by …
A primary consumers.
B secondary consumers.
C decomposers.
D producers.
1.1.7 The largest blood vessel in the human body that transports oxygenated
blood is the …
A pulmonary artery.
B aorta.
C superior vena cava.
D coronary artery.
1.1.8 Study the list below and answer the question which follows:
(i) Plate tectonics
(ii) Ice ages
(iii) Decrease in carbon dioxide levels
(iv) Fossil tourism
Which of the above changes were an important influence on the
history of life on Earth?
A (i) and (ii)
B (i) and (iii)
C (i),(ii) and (iii)
D All of the above
1.1.9 The site in Gauteng where humans were thought to originate is …
A the Cradle of Humankind.
B the Drakensberg Mountains.
C Mapungubwe.
D Egoli.
1.1.10 The relatively short geological time frame during which organisms
diversified, thus increasing the diversity of species on Earth:
A Palaeozoic era
B Cambrian Explosion
C Jurassic period
D Cretaceous period
(10 x 2) (20)
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Grade10
1.2 Give the correct biological term for each of the following descriptions. Write
only the term next to the question number (1.2.1 to 1.2.8) in the ANSWER
BOOK.
1.2.1 The study of fossils
1.2.2 Original land mass that started to break up 200 mya
1.2.3 Abiotic factors related to the soil
1.2.4 Organisms not able to produce their own food but rely on other
organisms for food
1.2.5 A well-defined area in which there is close interaction between plants,
animals and the environment
1.2.6 A land area such as a swamp that is saturated with water, either
permanently or seasonally
1.2.7 An inelastic membrane that forms a layer around the heart
1.2.8 Organisms responsible for decay and found at all trophic levels
except the first
(8x1) (8)
1.3 Indicate whether each of the descriptions in COLUMN I applies to A ONLY, B
ONLY, BOTH A AND B or NONE of the items in COLUMN II. Write A only, B
only, both A and B or none next to the question number (1.3.1 to 1.3.3) in
the ANSWER BOOK.
COLUMN I COLUMN II
1.3.1 Source of nitrates in the soil A: Bacteria
B: Photosynthesis
1.3.2 Abiotic factors A: Temperature
B: Light
1.3.3 Lymph vessels A: Valves
B: Longitudinal muscle
(3 x 2) (6)
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Grade10
1.4 According to the Five-Kingdom system of classification, each of the organisms
shown below belongs to a different Kingdom. Complete the table by filling in the
missing words. Write down only the question number (1.4.1 –1.4.10) and the
answer, for example 1.4.11 Animalia.
Organism
Kingdom 1.4.1 Protista Fungi 1.4.2 Animalia
Genus Paramecium Agaricus Protea Bos
Species caudatum Bisporus Cynaroides Taurus
Prokaryote Eukaryote Eukaryote
or 1.4.3 1.4.4 1.4.5
Eukaryote
Unicellular Unicellular or Multicellular Multicellular
or 1.4.6 Multicellular 1.4.7
Multicellular
Method of Autotrophic Autotrophic,
Feeding and Heterotrophic
1.4.8 1.4.9
heterotrophic and
Saprophytic
Scientific
1.4.10
name
(10 x 1) (10)
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Grade10
1.5 Study the diagram of the water cycle below.
1.5.1 Name the processes labelled A to D. (4)
1.5.2 Name ONE human activity which can affect the water cycle. (1)
1.5.3 What is the most important factor that affects the rate of the process (1)
labelled B? (6)
TOTAL SECTION A: 50
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Grade10
SECTION B
QUESTION 2
2.1 The following diagram represent an ecosystem.
fox weasel
hawk
thrush mouse
squirrel
rabbit
caterpillar
shrubs
grass mushrooms
[www.phinglink.com]
2.1.1 From the food web above name :
(a) ONE producer (2)
(b) TWO secondary consumers (4)
2.1.2 Use a food chain from the above ecosystem to draw a fully labelled
pyramid of energy with FOUR trophic levels. (7)
2.1.3 What would happen if all the weasels were removed from the
ecosystem? (2)
(15)
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Grade10
2.2 Aloes generally grow on rocky north-facing slopes, especially in the Eastern
Cape. Study the diagram below and answer the questions that follow.
2.2.1 Give TWO structural adaptation of the leaves of aloe plants to its
xerophytic mode of life. (4)
2.2.2 Explain what is meant by the terms:
(a) Aspect (2)
(b) Altitude (2)
2.2.3 Give FOUR abiotic factors that can be seen in the diagram above. (4)
(12)
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Grade10
2.3 The table below shows the results of an investigation which measured the
average global carbon dioxide levels in the atmosphere over a five-year period.
Year Carbon dioxide level
(parts per million)
2004 376,0
2005 377,0
2006 379,5
2007 381,0
2008 383,5
2.3.1 Draw a line graph to show the change in carbon dioxide levels (6)
over time.
2.3.2 Describe the trend shown in the table you drew in QUESTION (2)
2.3.1.
2.3.3 What is the dependent variable in the above investigation? (1)
2.3.4 Calculate the increase in carbon dioxide from 2004 to 2008. (4)
Show all calculations.
(13)
TOTAL QUESTION 2: [40]
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Grade10
QUESTION 3
3.1 The diagram below represents a simplified geological time-scale showing how
the number of families (groups of related species) has changed over a period
of time.
3.1.1 How many mass extinctions took place since the creation of the earth? (1)
3.1.2 Which mass extinction took place towards the end of the Palaeozoic (1)
era?
3.1.3 Which era had the longest duration? (1)
3.1.4 Name TWO factors or events known to have caused mass extinctions. (2)
3.1.5 When did the Triassic extinction take place? (2)
3.1.6 Which extinction was the biggest in terms of the number of families
that went extinct? (1)
3.1.7 Scientists believe that we are currently experiencing the sixth mass (1)
extinction. What is thought to be the cause of this mass extinction?
(9)
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3.2 The map below shows some of the fossil sites in South Africa. Study the
map and answer the questions that follow.
G
F
A
E
C
D
B
Glossopteris
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Grade10
3.2.1 Name ONE of the towns in Area A on the map where fossils of primitive (1)
plants like Glossopteris have been found.
3.2.2 Which town in the Eastern Cape (marked B) has fossil evidence of early (1)
plants?
3.2.3 Early human and pre-human fossils have been found in a number of (1)
locations in South Africa.
Which letter on the map shows the ‘Cradle of Humankind’ where many of
these fossils have been found?
3.2.4 The coelacanth was found in area C on the map. Why is this fish (3)
called a ‘living fossil’?
3.2.5 Explain how a fossil of a coelacanth would be formed. (5)
3.2.6 Name TWO ways in which fossils can be dated. (2)
3.2.7 Suggest ONE reasons why not all organisms will be fossilised. (1)
3.2.8 The Karoo National Park is found at D on the map. How can fossils found (2)
in the Karoo National Park benefit the people that live in the
area? (16)
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Grade10
3.3 Read the passage below.
3.3.1 What do we call the study of the distribution of existing and extinct plant (1)
and animal species in specific areas on Earth?
3.3.2 Name the continent that South America, Africa and Australia formed part (1)
of after it broke away from Pangaea.
3.3.3 Briefly explain the continental drift theory. (3)
3.3.4 Do giant anteaters and armadillo’s belong to the same genus? (1)
3.3.5 Give a reason for your answer in QUESTION 3.3.4. (2)
3.3.6 Write the scientific name for the nine banded armadillo correctly. (2)
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3.4 Explain how the change in oxygen levels in the atmosphere affected the history (5)
of life on Earth.
(15)
TOTAL QUESTION 3: [40]
TOTAL SECTION B: 80
SECTION C
QUESTION 4
Give a detailed description of the journey of a red blood cell as it travels from the
right atrium of the heart round the body and back to the left atrium. Also list the
differences between arteries and veins.
Content: (17)
Synthesis: (3)
(20)
NOTE: NO marks will be awarded for answers in the form of tables, flow charts or
diagrams.
TOTAL SECTION C: 20
GRAND TOTAL: 150
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