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ANSWERS

PAK-21 Activity 3. Information Variables
1. (a)
Wind Explosive mechanism The time taken for Manipulated
Animal and human Water the wet handkerchief variable
to dry
(b)
Constant
The surface area variable
预备，起！科学5, 版权所有·侵权必究
of handkerchief
exposed Responding
variable
Lalang Coconut Mimosa Balsom
pudica 4. The bigger the surface area of the handkerchiefs
Wind Water Human and Explosion exposed, the shorter the time taken for the
animals mechanism handkerchiefs to dry.
C 1. (a) Seeds
Small Waxy skin Pleasant Becomes dry (b) Saplings
Wing-like Waterproof smell and explodes 2.
structure Has air Edible
Lightweight cavities
* Accept other suitable answers
2. Type of leaf veins: Parallel
3.
Sunlight Starch
Carbon + Water +
dioxide
Chlorophyll Oxygen
Series circuit Parallel circuit

Circuit Reinforcement 1
Practice
Series Parallel
Objective Questions
Brightness of the bulbs Dim Bright
1. C 2. A 3. D 4. B
Subjective Questions
Practice 1 Science Process Skills
1. (a) Measuring cylinder
1.1 Science Process Skills (b) Investigating the relationship between the size of
container and the f nal volume of water in the container
A 1. Distance – Measuring tape, Ruler after 30 minutes.
(b) Metres (m) / Kilometres (km) (c) Decreases
2. Volume – Beaker, Measuring cylinder
(a) Millilitres (ml) (d) Information Variables
(b) Litres (l) Manipulated
3. Mass – Triple beam balance, Lever balance variable
(a) Grams (g) The size of
(b) Kilograms (kg) containers Responding
4. Time – Stopwatch, Watch variable
(b) Minutes (min) / Hours (hrs)
The f nal volume Constant
B 1. To investigate the relationship between the surface of water variable
area of handkerchiefs exposed with the time taken
for the handkerchiefs to dry. (e) The bigger the size of container, the lesser the water
2. left in the container.
Liquid Gas

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12 Answer Practice Go Science Yr5.indd 1 24/09/2021 5:31 PM