Page 19 - Syok Praktis PBD (2023) Science TH4

Science Year 4 Answers

B 1. Affects the function of sensory organs and the brain 4. Moist skin
2. Causes someone to be hallucinating, incapacitated or
addicted
3. Causes intoxication (drunkenness)

Summative Practice 2
B Lungs – Tortoise, frog, duck
Gills – Fish
Objective Questions Moist skin – Frog, snail, earthworm
Spiracle – Dragonfly, grasshopper
1. D 2. A 3. B 4. C 5. C
C 1. land, water
Subjective Questions 2. Moist skin and lungs
3. Gills
1. (a) J: Medium 4. water, water, land
K: Low
L: High
3.2 Vertebrates
(b)
J K L A Vertebrates – Sperm whale, tuna, seahorse, turtle, moray
eel
Invertebrates – Jellyfish, clam, starfish, octopus, crab
B (a) Amphibians – Y – (v)
Slow Jumping Running in (b) Bird – V – (iii)
walk jacks place (c) Fish – W – (ii)
(d) Reptiles – Z – (iv)
(c) 18 times (e) Mammals – X – (i)
2. (a) The hand is moved away quickly upon touching a C 1. J: Lungs
sharp object. K: Moist skin
(b) Skin L: Gills
(c) His hand will be wounded. 2. V
(d) – To prevent sensory organs from being wounded. 3. I : Amphibians
– The sensory organ can function properly. II : Fish
III : Bird
Practice IV : Reptiles
3 Animals V : Mammals
4. (a) V
3.1 Breathing Organ of Animals (b) II
(c) V
A 1. Lungs
Summative Practice 3

Objective Questions
1. B 2. A 3. B 4. D 5. C

Subjective Questions
2. Gills
1. (a) Vertebrates – Q, S
Invertebrates – P, R
(b) P – Spiracle
Q – Gills
R – Moist skin
S – Lungs
3. Spiracle (c) Q
2. (a) Mammals
(b) Give birth to live young
(c) Lungs
(d) How they move

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Answers.indd 2 27/09/2022 2:04 PM