Page 30 - Genius PBD Science Year 6
P. 30
Science Year 6 Answers
5. (a) The marble rolls on the carpet (d) Able to solve problem in (b) Yes. Friction slowed down the
surface takes a shorter time daily life, in which when movement of an object.
to stop compared to the the pressure is high in the (c) Friction increases
cement. pipe, the blocked dirt can be (d) Put roller under the box.
(b) The time taken for the marble pushed.
to roll on the carpet surface is
shorter because the friction is UNIT 7 Speed
higher on a rough surface. SUMMATIVE PRACTICE 6
(c) Friction is high on a rough 7.1 Speed of Objects
surface while friction is low on Objective Questions
a smooth surface. 1. (a) (i) ✓
(d) 5 – 9 seconds 1. D 2. D 3. D 4. A 5. D (ii) ✗
6. (a) (i) different types of balls (iii) ✓
(ii) time taken for the balls to Subjective Questions (iv) ✗
roll 1. (a) (b) Kilometre per hour (km/h)
(iii) same surface, push (c) Metre per second (m/s) or
(b) Hockey ball takes shorter centimetre per second (cm/s)
time to stop compared to the Box (d) Speed is a fast or slow
tennis ball. measurement of bicycle
(c) Hockey ball is heavier than moving from one place to
tennis ball. So, hockey ball another place over one hour
has greater friction compared period
to the tennis ball. 2. (a) (i) Theven
(d) When the mass of the ball (ii) Zainal
increase, the time taken for
the ball to roll decrease. (b) (i)
7. (a) grease
(b) talcum
(c) patterned
(d) rough
8. (a) The water does not flow out
of the glass.
(b) Water does not flow out
because the air pressure
outside the card prevents the
water from flowing out.
(c) (ii) Theven, Daren, Zainal, Kamal
(c) (i)
8
7
Air
pressure 6
9. (a) (i) Low air pressure 5
(ii) High air pressure Speed in 100 metres
(b) lower 4
10. (a), (d), (f) 3
11. (a) The sink in Maya’s house is
clogged. 2
(b) (ii) Plunger pump
(c) Once the plunger is pressed, 1
low pressure exists inside
it and when the plunger is 0
pulled, a higher pressure in Kamal Zainal Daren Theven
the pipe will push the clogged Pupil’s name
dirt out.
© Penerbitan Pelangi Sdn. Bhd. A4
00 Answer Mahir Sci Y6.indd 4 26/09/2022 4:03 PM
