Page 27 - Genius PBD Science Year 4

Science Year 4 Answers

(d) Breathing difficulties / Lack of (b) Gills
2.3 Human Responses to Stimuli
oxygen in the body / Muscle (c) Lungs
10. (a) stimuli cramp because of a lack of (d) Moist skin
(b) light, smell, sound, taste and oxygen in the body. (e) Gills
touch (e) The rate of breathing is the (f) Lungs
11. (a) Responds toward light number of upward and 2. Lungs: Crocodile, frog
(b) Responds toward sound downward chest movements Gills: Tadpole, crab
(c) Used for smelling in one minute. Skin: Leech, frog
(d) Used for tasting sweet, sour, 2. (a) The foot was pulled away Spiracles: Grasshopper,
salty and bitter substances quickly when stepped on the caterpillar, butterfly
(e) Hold and touch, feel warmth, sharp nail. 3. (a) Frog
coldness and pressure (b) Skin (b) The animals need the organs
12. (a) Skin (c) Syafiqah’s foot will suffer to live both on land and in
Removes the hand from the serious injuries. water.
hot kettle (d) (i) So that our sensory (c) Salamander / Newt
(b) Nose organs would not be hurt 4. Pupil’s answer
Cover the nose with hands (ii) To prevent our sensory
(c) Tongue organs from not 3.2 Vertebrates
Screwed up face functioning normally.
13. (a) (i) A hot iron 5. (a) (i) Vertebrates are animals
with backbones.
(ii) Retracting her hand UNIT 3 Animals (ii) Invertebrates are animals
quickly with no backbones.
(b) The girl’s hand would be 3.1 Breathing Organs of Animals (b) Tiger, snake, deer, lizard
burned.
(c) Protect ourselves from danger 1. (a) Spiracles
14. (a) Drug abuse (✗) 6.
(b) Smoking (✗)
(c) Exercising Animals Method of Breathing Body covering Habitat
(d) Consuming alcoholic drinks reproduction organ
(✗) Mammals Gives birth Lungs Fine hair On land
(e) Consuming fruits and
vegetables Reptiles Lays eggs Lungs Scales or hard On land
(f) Consuming unhealthy food shells
(✗) Lungs, moist On land and in
(g) Getting enough rest and Amphibians Lays eggs skin Moist skin water
sleep
(h) Glue sniffing (✗) Birds Lays eggs Lungs Feathers On land
15. Student’s answer Fish Lays eggs Gills Scales In water

7. Mammals: Goat, whale skin as the breathing
SUMMATIVE PRACTICE 2 Reptiles: Lizard, turtle organ in water.
Amphibians: Frog 2. (a) (i) Lungs and moist skin
Objective Questions Birds: Ostrich, Eagle (ii) P is an amphibian that
Fish: Goldfish, shark has two breathing organs
1. C 2. C 3. B 4. C 5. B such as frogs. When
6. B animal P is on land, it
SUMMATIVE PRACTICE 3 breathes through the
Subjective Questions
lungs. When in water,
Objective Questions animal P breathes
1. (a) High rate of Low rate of through moist skin.
breathing breathing 1. D 2. B 3. B 4. A 5. C (b) • Animals in Q gives birth
Cycling Reading 6. C 7. B 8. B 9. B while animals in R lays
eggs.
Swimming Sleeping Subjective Questions • Animals in Q have fine
(b) This is because the body 1. (a) Spiracles hair while animals in R
requires more oxygen. / The (b) (i) and (iii) have scales or hard skin.
lungs need to take in more air. (c) (i) yes (c) Cockroach/ grasshopper/ ant
(c) The more strenuous the (ii) The animals stay alive (Accept any insects)
activity, the higher the rate of because they use their
breathing.

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13 Jawapan Genius PBD SCIENCE YR4.indd 2 19/10/2022 5:13 PM