Page 23 - BILINGUAL SCORE A+SAINS 双语特优A+系列科学

UPSR 特优 A+ 系列（中英双语） 科学 答案

14. A 电路 X 是并联电路，而电路 Y 是串联电 22. D 塑料瓶有很强的浮力，而且不吸水。因
路。如果并联电路中的一个灯泡坏了，其 此，它适用于制作船身。
他的灯泡会继续发亮。如果串联电路中的 A plastic bottle has a strong buoyant force and it
一个灯泡坏了，其他的灯泡都不会发亮。 does not absorb water. Therefore, it is suitable to
Circuit X is a parallel circuit while circuit Y is be used to make the hull of the boat.
a series circuit. If one bulb spoils in the parallel
circuit, the other bulb remains lit. If one bulb from 23. B 窗户上的拉手因为生锈了而很难被拉动。
the series circuit spoils, the other bulb would not 为了防止生锈，拉手上应该抹上润滑油或
light up. 油。

The window handle is �����be turned because
to
15. D 与装满书的箱子相比，空箱子产生的摩擦 it is covered with rust. To prevent rusting, grease
双语特优A+系列科学, 版权所有·侵权必究
力较小。因此，推动箱子至相同的距离所 or oil should be applied to the handle.
需的时间较短。
The empty box produces less frictional force 24. A 当空气被吹入橡胶管时，空气把玻璃杯
compared to the box which is full of books. 中的空位填满了。这项实验显示气体（空
Therefore, the time taken to push the empty box to
the same distance is shorter. 气）会占据空间。
When air is blown through the rubber tube, the air
l
16. D 举重运动员利用碳酸镁粉来增加手掌和杠 �ls the empty space in the glass. This investigation
铃之间的摩擦力。 shows that gas (air) occupies space.
A weightlifter uses magnesium carbonate powder to
increase friction between the palms and the barbell. 25. B 在有风和阳光的情况下，挂着晾干的衣服
会较快干。曝露在空气中的的表面也会影
17. B 当羽毛球球员将羽毛球拍向对手时，羽毛 响衣服晾干的速度。
球移动的方向会改变。 Clothes that are hung to dry will dry faster with
The direction of the moving shuttlecock would the presence of wind and sunlight. The surfaces of
change when the badminton player hits the clothes that are exposed in the air will also affect
shuttlecock to his opponent. the drying speed.

18. B 粗糙的表面，如有沙粒的表面产生更多摩 26. C 糖溶液是中性的，所以不会改变蓝色和红
擦。因此，弹子在有沙粒的表面上移动得 色石蕊试纸的颜色。
较慢。 The sugar solution is neutral, as such it does not
A rough surface like a sandy surface produces more change the colour of the red litmus paper and the
friction. Therefore, the movement of the marble is blue litmus paper.
slower on a sandy surface.
27. C 在凤梨装罐过程中，罐头被密封后必须高
19. B 当光沿着直线传播，并被不透明体阻碍 温加热，以杀死所有细菌。
时，就会形成影子。 In the pineapple canning process, once the can is
A shadow is formed when the light travels in a closed tight (airtight), it needs to be heated at a
straight line and is blocked by opaque objects.
high temperature to kill all the bacteria.
20. C 当冰块被放进装着热水的烧杯里时，热水
会将热量释放到周围，导致水温下降。 28. D 随处丢弃的垃圾会成为细菌和害虫滋长的
When ice cubes are placed in a beaker of hot water, 温床。
the hot water would release heat to its surroundings Littered rubbish would become the breeding ground
and cause a decrease in the water temperature. for bacteria and pests.

21. B 气球有弹性。这使它能在被充气时膨胀， 29. B 根据表格，肉在 5°C 的温度下的保鲜期最
并在气体被放掉后恢复原状。 长。低温减缓了微生物生长。
The balloon expands when ���with air because it Based on the table, meat remains fresh the longest
is elastic, which means it can expand and go back at a low temperature which is at 5°C. A low
to its original shape when the air is released. temperature delays the growth of microorganisms.

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