1.
(a) The plant will not be able to carry out photosynthesis in the absence of leaves that contain chlorophyll to trap sunlight.
(b) The plant is unable to absorb water and mineral salts from the soil and the plant will not be held firmly to the ground.
(c) The plant is unable to stand upright and different parts of the plant cannot be connected. Without the stem, there will also be no phloem tubes to carry food from the leaves to other plant parts and no xylem tubes to carry water and mineral salts from the roots to other plant parts.
(d) Food cannot be stored in the fruits and seeds are not protected.
(e) The plant is unable to produce a young plant from seeds.
(f) The plant cannot bear fruits as there are no flowers to develop into fruits.
2.
(I) (A) phloem tubes
(B) xylem tubes
(ii) A transport good from the leaves to other plant parts.
B transport water and mineral salts from the roots to other plant parts.
Wednesday, June 16, 2010
Tuesday, June 15, 2010
P6 Science Revision-Man and His Environment
Q1. When does deforestation occur n what is a recommended remedy to this problem? (3m)
Ans: Deforestation occurs when forests are cleared and trees are cut down to clear land for the construction of buildings and to retrieve raw materials for construction, furniture making and paper production.
A recommended remedy is reforestation.
Q2. Explain a positive n a negative impact of science and technology on our lives. (4m)
Ans: Science and technology has helped to produce fermented food and canned food. As such, a greater variety of food is produced and these foods have a longer shelf life. Thus, the positive impact is that food is more readily available.
Science and technology has also introduced more forms of vehicles which inevitably produce harmful substances that pollute the air. Hence, the negative impact is air pollution.
Q3. How is Genetic Modification (GM) useful?
List 3 different ways. (3m)
Ans: GM enables farmers to produce crops that are pest-resistant or drought-resistant, thus leading to a greater yield for the farmers.
With pest-resistant crops, less pesticides is needed and this results in cost savings for the farmers and less pollution to the environment.
The quality of food is improved by changing flavour and having higher vitamin content.
Ans: Deforestation occurs when forests are cleared and trees are cut down to clear land for the construction of buildings and to retrieve raw materials for construction, furniture making and paper production.
A recommended remedy is reforestation.
Q2. Explain a positive n a negative impact of science and technology on our lives. (4m)
Ans: Science and technology has helped to produce fermented food and canned food. As such, a greater variety of food is produced and these foods have a longer shelf life. Thus, the positive impact is that food is more readily available.
Science and technology has also introduced more forms of vehicles which inevitably produce harmful substances that pollute the air. Hence, the negative impact is air pollution.
Q3. How is Genetic Modification (GM) useful?
List 3 different ways. (3m)
Ans: GM enables farmers to produce crops that are pest-resistant or drought-resistant, thus leading to a greater yield for the farmers.
With pest-resistant crops, less pesticides is needed and this results in cost savings for the farmers and less pollution to the environment.
The quality of food is improved by changing flavour and having higher vitamin content.
Friday, June 11, 2010
Thesaurus-June holidays
1. Demure-r(8)
-m(6)
-s(3)
2. Traumatise-s(5)
-d(7)
3. Zeal-e(10)
-e(7)
4. Rupture-b(5)
-b(5)
5. Policeman-c(3)
-c(9)
6. Scary-f(11)
-s(6)
7. Taint-d(5)
-p(7)
-c(11)
8. Disaster-c(8)
-c(11)
9. Engulf-s(7)
-o(9)
10. Blur-u(7)
-o(7)
11. Disappeared-v(8)
-e(10)
12. Nice smell-a(5)
-f(9)
13. Strong-s(6)
-r(6)
14. Catch-c(7)
-a(9)
15. Show-d(7)
-e(7)
16. Cry-w(4)
-s(3)
-w(4)
17. Start-b(5)
-c(8)
18. Mobile-p(8)
19. Hope-e(11)
-a(12)
20. Examined-s(11)
-o(8)
19.
-m(6)
-s(3)
2. Traumatise-s(5)
-d(7)
3. Zeal-e(10)
-e(7)
4. Rupture-b(5)
-b(5)
5. Policeman-c(3)
-c(9)
6. Scary-f(11)
-s(6)
7. Taint-d(5)
-p(7)
-c(11)
8. Disaster-c(8)
-c(11)
9. Engulf-s(7)
-o(9)
10. Blur-u(7)
-o(7)
11. Disappeared-v(8)
-e(10)
12. Nice smell-a(5)
-f(9)
13. Strong-s(6)
-r(6)
14. Catch-c(7)
-a(9)
15. Show-d(7)
-e(7)
16. Cry-w(4)
-s(3)
-w(4)
17. Start-b(5)
-c(8)
18. Mobile-p(8)
19. Hope-e(11)
-a(12)
20. Examined-s(11)
-o(8)
19.
Monday, May 10, 2010
Science Revision for SA1
P4 Science - Matter
Matter is anything that has mass and occupies space.
A solid
- has a definite shape
- does not take the shape of the container it is put into
- has a definite volume
- cannot be compressed
- does not take the volume of the container it is put into.
A liquid
- does not have a definite shape
- takes the shape of the container it is put into
- has a definite volume
- cannot be compressed
- does not take the volume of the container it is put into.
A gas
- does not have a definite shape
- takes the shape of the container it is put into
- does not have a definite volume
- can be compressed
- takes the volume of the container it is put into.
Water boils at 100 degrees celsius , melts at 0 degrees celsius and freezes at 0 degrees celsius.
Impurities such as salt or sugar can increase the boiling point of water and lower the freezing and melting points of water. Therefore, sea water boils at a temperature above 100 degrees celsius.
When water boils, air in the water escapes in the form of air bubbles. As such, plants and animals cannot survive in boiled water as there is no air in boiled water.
1. What is matter?
2. Name 7 non-matter.
3. What are the 3 states of matter?
4 What are the properties of (a) solids?
(b) liquids?
(c) gases?
5. How is a solid different from a liquid?
6. How is a solid different from a gas?
7. How is a liquid different from a gas?
8. What is the boiling point of water?
9. What is the freezing point of water?
10. What is the change in state when water evaporates?
11. What is the change in state when ice melts?
12. What is the change in state when water freezes?
13. List 3 ways in which an ice cube is different from water vapour?
14. What is observed water boils?
15. Does pure water or sea water boil at a higher temperature?
P5 Science - Water
1. Why is the water cycle important?
2. Name 3 ways to reduce the use of water.
3. What are the 3 main causes of water pollution?
4. Is there a gain of heat or loss of heat in the following processes?
(a) condensation
(b) evaporation
(c) boiling
(d) freezing
(e) melting
5. What is the boiling point of water?
6. What is the freezing point of water?
7. What is the change in state when water evaporates?
8. What is the change in state when ice melts?
9. What is the change in state when water freezes?
10. List 3 ways in which an ice cube is different from water vapour?
11. What is observed when water boils?
12. Does pure water or sea water boil at a higher temperature?
P6 Science - Energy
1. What is the energy conversion when an apple drops from an apple tree?
2. What are the factors to consider when choosing which material to use to make an item?
3. What is a force?
4. (a) Name a difference between friction and magnetism.
(b) Why is friction important? List as many points as possible.
(c) Why does friction sometimes become a problem?
5. Alex has 2 objects. How can he prove if they are both magnets?
6. Explain the energy conversion that takes place in a power station.
7. When a ball is dropped from a distance above ground, it bounces but not back to the original height where it was dropped.Why?
Matter is anything that has mass and occupies space.
A solid
- has a definite shape
- does not take the shape of the container it is put into
- has a definite volume
- cannot be compressed
- does not take the volume of the container it is put into.
A liquid
- does not have a definite shape
- takes the shape of the container it is put into
- has a definite volume
- cannot be compressed
- does not take the volume of the container it is put into.
A gas
- does not have a definite shape
- takes the shape of the container it is put into
- does not have a definite volume
- can be compressed
- takes the volume of the container it is put into.
Water boils at 100 degrees celsius , melts at 0 degrees celsius and freezes at 0 degrees celsius.
Impurities such as salt or sugar can increase the boiling point of water and lower the freezing and melting points of water. Therefore, sea water boils at a temperature above 100 degrees celsius.
When water boils, air in the water escapes in the form of air bubbles. As such, plants and animals cannot survive in boiled water as there is no air in boiled water.
1. What is matter?
2. Name 7 non-matter.
3. What are the 3 states of matter?
4 What are the properties of (a) solids?
(b) liquids?
(c) gases?
5. How is a solid different from a liquid?
6. How is a solid different from a gas?
7. How is a liquid different from a gas?
8. What is the boiling point of water?
9. What is the freezing point of water?
10. What is the change in state when water evaporates?
11. What is the change in state when ice melts?
12. What is the change in state when water freezes?
13. List 3 ways in which an ice cube is different from water vapour?
14. What is observed water boils?
15. Does pure water or sea water boil at a higher temperature?
P5 Science - Water
1. Why is the water cycle important?
2. Name 3 ways to reduce the use of water.
3. What are the 3 main causes of water pollution?
4. Is there a gain of heat or loss of heat in the following processes?
(a) condensation
(b) evaporation
(c) boiling
(d) freezing
(e) melting
5. What is the boiling point of water?
6. What is the freezing point of water?
7. What is the change in state when water evaporates?
8. What is the change in state when ice melts?
9. What is the change in state when water freezes?
10. List 3 ways in which an ice cube is different from water vapour?
11. What is observed when water boils?
12. Does pure water or sea water boil at a higher temperature?
P6 Science - Energy
1. What is the energy conversion when an apple drops from an apple tree?
2. What are the factors to consider when choosing which material to use to make an item?
3. What is a force?
4. (a) Name a difference between friction and magnetism.
(b) Why is friction important? List as many points as possible.
(c) Why does friction sometimes become a problem?
5. Alex has 2 objects. How can he prove if they are both magnets?
6. Explain the energy conversion that takes place in a power station.
7. When a ball is dropped from a distance above ground, it bounces but not back to the original height where it was dropped.Why?
Wednesday, April 21, 2010
Revision for SA1
1. breadth=width
2. breath
3. breathe
4. necessary
5. necessity
6. necessarily
7. unnecessarily
8. occasion
9. occasionally
10. especially
11. exception
12. immigrate
13. emigrate
14. migrate
15. immigrant
16. emigrant
17. migrant
18. migratory birds
19. to seek revenge
20. to exact revenge
21. to avenge his death
22. environmental friendly
23. government
24. pronounce
24. pronunciation
25. He ducked and managed to dodge the blow.
26. elementary=rudimentary=basic=foundation
27. a gaggle of geese
28. a swarm of bees
29. a troop of monkeys
30. a troupe of performers
31. stench=odour
32. fragrance of the flowers
33. aroma of the coffee
34. pioneer
35. trial and error
36. achievement
37. initiate=start
38. random
39. a congregation of worshippers
40. quantities
42. qualities
43. He coined the sausage on a bun hot dog.
44. access
45. accessible
46. excess
47. excessive
48. oblivious to=unaware of
49. prominent
50. seize the opportunity=grab the chance
51. courageous=brave=bold=plucky
52. twentieth century
53. disappointed
54. disappeared
55. conscious
56. conspicuous=obvious=apparent
57. queasy
58. complacent=over-confident
59. veterinarian
60. sophisticated=complicated
2. breath
3. breathe
4. necessary
5. necessity
6. necessarily
7. unnecessarily
8. occasion
9. occasionally
10. especially
11. exception
12. immigrate
13. emigrate
14. migrate
15. immigrant
16. emigrant
17. migrant
18. migratory birds
19. to seek revenge
20. to exact revenge
21. to avenge his death
22. environmental friendly
23. government
24. pronounce
24. pronunciation
25. He ducked and managed to dodge the blow.
26. elementary=rudimentary=basic=foundation
27. a gaggle of geese
28. a swarm of bees
29. a troop of monkeys
30. a troupe of performers
31. stench=odour
32. fragrance of the flowers
33. aroma of the coffee
34. pioneer
35. trial and error
36. achievement
37. initiate=start
38. random
39. a congregation of worshippers
40. quantities
42. qualities
43. He coined the sausage on a bun hot dog.
44. access
45. accessible
46. excess
47. excessive
48. oblivious to=unaware of
49. prominent
50. seize the opportunity=grab the chance
51. courageous=brave=bold=plucky
52. twentieth century
53. disappointed
54. disappeared
55. conscious
56. conspicuous=obvious=apparent
57. queasy
58. complacent=over-confident
59. veterinarian
60. sophisticated=complicated
Thursday, April 1, 2010
Thesaurus
1. callous
-(1)ins________(11)
-(2)cr___(5)
2. perplexed
-(1)ba_____(7)
-(2)pu_____(7)
3. yield
-(1)pro_______(10)
-(2)ga__(4)
4. potent
-(1)pow_____(8)
-(2)inf________(11)
5.infamous
-no_______(9)
6. abhor
-(1)de____(6)
-(2)ha__(4)
7. expedite
-(1)ha____(6)
-(2)qu_____(7)
8. entice
-(1)at_____(7)
-(2)te___(5)
9. disgruntled
-(1)an___(5)
-(2)dis_________(12)
10. plucky
-(1)cou_______(10)
-(2)br___(5)
11. amicable
-fr______(8)
12. convict
-(1)pr______(8)
-(2)ja______(8)
13. pompous
-(1)ha_____(7)
-(2)ar______(8)
-(3)pr___(5)
14. appease
-(1)pl_____(7)
-(2)pa____(6)
15. vital
-(1)im_______(9)
-(2)es_______(9)
-(3)ne_______(9)
16. concoct
-(1)cr____(6)
-(2)in____(6)
17. dwindle
-(1)di______(8)
-(2)de______(8)
-(3)re____(6)
18. authentic
-(1)or______(8)
-(2)ge_____(7)
19. a morsel
-(1)a mo______(8)
-(2)a li____(6)
20. lackadaisical
-(1)not ea___(5)
-(2)not en__________(12)
-(3)unin________(12)
-(1)ins________(11)
-(2)cr___(5)
2. perplexed
-(1)ba_____(7)
-(2)pu_____(7)
3. yield
-(1)pro_______(10)
-(2)ga__(4)
4. potent
-(1)pow_____(8)
-(2)inf________(11)
5.infamous
-no_______(9)
6. abhor
-(1)de____(6)
-(2)ha__(4)
7. expedite
-(1)ha____(6)
-(2)qu_____(7)
8. entice
-(1)at_____(7)
-(2)te___(5)
9. disgruntled
-(1)an___(5)
-(2)dis_________(12)
10. plucky
-(1)cou_______(10)
-(2)br___(5)
11. amicable
-fr______(8)
12. convict
-(1)pr______(8)
-(2)ja______(8)
13. pompous
-(1)ha_____(7)
-(2)ar______(8)
-(3)pr___(5)
14. appease
-(1)pl_____(7)
-(2)pa____(6)
15. vital
-(1)im_______(9)
-(2)es_______(9)
-(3)ne_______(9)
16. concoct
-(1)cr____(6)
-(2)in____(6)
17. dwindle
-(1)di______(8)
-(2)de______(8)
-(3)re____(6)
18. authentic
-(1)or______(8)
-(2)ge_____(7)
19. a morsel
-(1)a mo______(8)
-(2)a li____(6)
20. lackadaisical
-(1)not ea___(5)
-(2)not en__________(12)
-(3)unin________(12)
Tuesday, January 26, 2010
P5/6 - Spelling List
1. hollered
2. clenched his fist
3. stagger backwards
4. impact
5. saw his face morph into a furious glare
6. undaunted
7. retaliating
8. dissatisfied
9. reflexively
10. shoving me aside
11. without hesitation
12. pleaded
13. he lunged at me
14. flushed with anger
15. retorted
16. conviction
17. yanked
18. incensed
19. on impulse
20. disgruntled
21. chugging of the motor
22. bait
23. compartment
24. embankment
25. anchor
26. pleasantries
27. contraband cigarettes
28. wads of notes
29. coastguard vessel
30. camouflaged
31. resonated
32. foliage
33. my legs quivered
34. stunned
35. growled
36. baring its teeth
37. rustling of leaves
38. drizzle
39. squeals and screeches
40. on the prowl again
41. perpetrator
42. squabble
43. oblivious
44. argument
45. demanded for compensation
46. incredulously
47. glaring fiercely
48. persuaded
49. embarrassment
50. grudgingly
51. tingling sensation
52. simultaneously
53. malfunctioned
54. tumultuous trip
55. suspicions were aroused
56. a harrowing experience
57. permanent damage
58. monsoon drain
59. wistfully
60. the area was deserted
61. rain pelted down
62. barbecued food
63. gasped in amazement
64. fluorescent lights
65. thunderous authoritative voice
66. intricate
67. porridge
68. buoyant atmosphere
69. fidgeted
70. his body tingled with excitement
71. declined
72. flabbergasted
73. trudged
74. access card
75. whoops of excitement
76. impromptu party
77. monologue
78. perky
79. enclave
80. resume
2. clenched his fist
3. stagger backwards
4. impact
5. saw his face morph into a furious glare
6. undaunted
7. retaliating
8. dissatisfied
9. reflexively
10. shoving me aside
11. without hesitation
12. pleaded
13. he lunged at me
14. flushed with anger
15. retorted
16. conviction
17. yanked
18. incensed
19. on impulse
20. disgruntled
21. chugging of the motor
22. bait
23. compartment
24. embankment
25. anchor
26. pleasantries
27. contraband cigarettes
28. wads of notes
29. coastguard vessel
30. camouflaged
31. resonated
32. foliage
33. my legs quivered
34. stunned
35. growled
36. baring its teeth
37. rustling of leaves
38. drizzle
39. squeals and screeches
40. on the prowl again
41. perpetrator
42. squabble
43. oblivious
44. argument
45. demanded for compensation
46. incredulously
47. glaring fiercely
48. persuaded
49. embarrassment
50. grudgingly
51. tingling sensation
52. simultaneously
53. malfunctioned
54. tumultuous trip
55. suspicions were aroused
56. a harrowing experience
57. permanent damage
58. monsoon drain
59. wistfully
60. the area was deserted
61. rain pelted down
62. barbecued food
63. gasped in amazement
64. fluorescent lights
65. thunderous authoritative voice
66. intricate
67. porridge
68. buoyant atmosphere
69. fidgeted
70. his body tingled with excitement
71. declined
72. flabbergasted
73. trudged
74. access card
75. whoops of excitement
76. impromptu party
77. monologue
78. perky
79. enclave
80. resume
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