6. Ovulation
Uterus wall in Diagram 6.2 is thicker than Diagram 6.1
preparation for implantation of embryo
Ovum will die // degenerates next menstruation will start
Menstruation phase
9. Alcohol // muddy water // salt solution // sea water // any
acceptable
To condense water vapour to liquid // for condensation process
10. Straw bends
Refraction of light
Rainbow
Mirage
P1: To avoid injury to the people trying to jump
into the pool
P2: To warn people that the pool actual depth is
shallower than apparent depth
11. P1: Draw line (away from normal line)
P2: Draw straight dashed line from observer
and the image of the fish.
P1: Hafiz must aim to the bottom of the pond
. E1: Because image of the fish appears closer to
surface of the pond.
E2: Because refraction occurs the light refract
away from normal line as it moves from denser to
less dense medium (pond to air)
12. Process of transferring pollen grain from the anther to
the stigma
E1: Sticky stigma to enable the pollen grains to stick
onto the bee.
E2: To enable the pollen grains to stick onto the
stigma of a flower.
P1: Remove the anthers from plant X or Y.
P2: Cover the anther from plant X with plastic.
13. P1. Cross-pollination is used to increase yields of crops
P2. Obtain crops with higher quality
P3. Obtain crops that are resistant to pests and diseases
P4. Obtain crops that mature earlier
P5. Obtain variety in new plants
oxygen
fuel E1: Water is denser than oil
E2: Water sinks in the oil
E3: With high temperature during fire, water will
evaporate faster.
E4: Causing a bigger flame
15. P1: Diagram 10.5 (b) // Mask N95
E1: Common face masks available in stores may not
provide sufficient protection against haze particles.
E2: Surgical mask does not design to protect from
inhaling airborne / dust
E3: N95 filter dust and hazardous substance (1P + 2E)
17. P1: Loss of life
E1: Early signs of disaster to save lives and move to other
places
P2: Destruction of infrastructure / buildings
E2: Using satellite to forecast weather
P3: Economic Growth will decrease
E3: Preventing tall buildings in the area of high economic
potential
P4: Coastal erosion
E4 : build groins act as a barrier to longshore currents //
Planting of vegetation can be used to help control erosion
help
to anchor the sand // Build jetties to keep sand from
entering a
ship channel.
Note : 2P+2E. P must correspond with E
19. E1: toothpicks as pole of the building
E2: Marshmallow acts as (ball bearing) to absorb the
impact of vibration
E3: the structure does not collapse
P + any 2E
Note : Use all marshmallows
and toothpicks given
Accept: any shape drawn
