Wei Loon wanted to find the amount of water taken in by a plant. He placed a plant in a measuring cylinder as shown in set-up A.
The results of his experiment were recorded in the table as shown.
set-up
amount of water in the measuring cylinder (cm3)
day 1
day 2
day 3
day 4
A
500
350
200
50
B
500
500
500
500
The purpose of set-up B is to ______.
Aprevent water loss to the surroundings
Bcontrol the amount of water loss in both set-ups
Censure that the loss of water is due to the plant only
Dmeasure the volume of water in the measuring cylinder
看答案和讲解
正确答案：C. ensure that the loss of water is due to the plant only
考点科学探究：对照组的作用 · Process skills: purpose of a control set-up
思路：B 没有植物，水量一直不变，说明水没有从别处流失；所以 A 少掉的水一定是植物吸走的。 Think: B has no plant and its water stays the same, which shows no water is lost in other ways. So the water lost in A is due to the plant only. 小提醒：对照组用来证明变化是由被测试的东西造成的。 Tip: A control set-up shows the change is caused only by what we are testing.
第 2 题光与影子圣尼各拉女校 2025 EOY 第 22 题
John wanted to find out how materials X and Y affect the amount of light passing through each material. He placed each material in the wooden box one at a time and measured the amount of light passing through using a light sensor as shown below.
Results of his experiment are shown below.
set-up
material
t (cm)
d (cm)
A
X
2
15
B
X
4
15
C
Y
2
12
D
Y
4
15
Which of these set-ups should John compare for a fair test?
AA and B only
BA and D only
CB and C only
DB and D only
看答案和讲解
正确答案：D. B and D only
考点公平测试：光穿过材料 · Fair test: light through materials
思路：要比较材料 X 和 Y，就只能改变材料，厚度 t 和距离 d 都要相同。B 和 D：t 都是 4 cm，d 都是 15 cm，只有材料不同。 Think: To compare X and Y, only the material should change. B and D have the same t (4 cm) and d (15 cm). 小提醒：只改变要比较的那一项。 Tip: Change only the thing you are comparing.
第 3 题磁铁恒力小学 2025 EOY 第 19 题
Samantha had four magnets, A, B, C and D, as shown below.
She brought each of them 5 cm away from a box of pins and observed the number of pins attracted by each magnet. She recorded her observations in the table below.
Magnet A
Magnet B
Magnet C
Magnet D
Number of pins attracted
35
25
40
30
Based only on Samantha’s results, she can conclude that .
Athe size of the magnet affects its strength
Bbigger magnets are weaker than smaller magnets
Csmaller magnets are weaker than bigger magnets
Dthe strength of a magnet does not depend on its size
看答案和讲解
正确答案：D. the strength of a magnet does not depend on its size
考点磁铁：磁铁大小与磁力强弱 · Magnets: magnet size and strength of magnet
思路：大小顺序是 A>B>C>D，吸针数却是 35、25、40、30，没有跟着大小变化，所以磁力和大小无关。 Think: The pin numbers do not go up or down with size, so strength does not depend on size.
第 4 题磁铁恒力小学 2025 EOY 第 21 题
Four metal bars, A, B, C and D are hung from a wooden rod as shown in the diagram below. The two ends of each metal bar are marked X and Y respectively. The North pole of a bar magnet is brought near X and then Y of each metal bar.
The observations made during the experiment are recorded in the table below.
Metal bar
North pole and End X
North pole and End Y
A
Not attracted
Not attracted
B
Attracted
Attracted
C
Repelled
Attracted
D
Attracted
Attracted
Which one of the following conclusions about the experiment is correct?
ABars B and D are made of iron.
BBar A is made of a magnetic material.
CAll the metal bars are made of magnetic materials.
DBar A is a weak magnet and Bar C is a strong magnet.
看答案和讲解
正确答案：A. Bars B and D are made of iron.
考点磁铁：用排斥测试辨认磁铁与磁性物质 · Magnets: using repulsion to identify a magnet
思路：A 两端都不被吸 → 不是磁性物质；C 有一端被排斥 → C 是磁铁；B、D 两端都被吸 → 是磁性物质（如铁）。四个选项中只有 (1) 合理。 Think: A is non-magnetic, C is a magnet (it repels), B and D are attracted at both ends, so they are magnetic materials such as iron.
第 5 题热菩提学校 2025 EOY 第 12 题
Peter wanted to find out how different materials affect the amount of time taken for the wax to melt.
A drop of wax is placed at the end of the material. The material is then heated at the opposite end. The time taken for the wax to melt is recorded on the table below.
Material
P
Q
R
S
Time taken for wax to melt (s)
25
55
40
70
Based on the results above, which material is the best conductor of heat?
AP
BQ
CR
DS
看答案和讲解
正确答案：A. P
考点热：热的良导体（蜡熔化时间） · Heat: good conductors of heat (wax melting time)
思路：热传得越快，蜡就越快熔化。P 只用了 25 秒，最快，所以 P 是最好的热导体。 Think: The faster heat travels, the faster the wax melts. P took only 25 s, the shortest, so P is the best conductor of heat. 小提醒：时间越短 → 导热越好。 Tip: Shorter time → better conductor.
第 6 题植物的部分与功能菩提学校 2025 EOY 第 23 题
Alex wanted to find out if the number of leaves of a plant affects the amount of water taken in by the plant. Three similar plants, S, T and U, with different numbers of leaves were placed in a brightly lit place.
The layer of oil on top prevents water from being lost to the surroundings.
The table below shows the amount of water left in each set-up after a few days.
Volume of water (ml)
S
T
U
Start of experiment
150
150
150
End of experiment
80
95
88
What can Alex conclude from the results of his experiment?
AThe more leaves a plant has, the lesser the amount of water left.
BThe fewer leaves a plant has, the lesser the amount of water left.
CThe more leaves a plant has, the greater the amount of water left.
DThe number of leaves of a plant does not affect the amount of water left.
看答案和讲解
正确答案：A. The more leaves a plant has, the lesser the amount of water left.
考点植物的部分：叶子数量与吸水量 · Plant parts: number of leaves and water taken in
思路：S 叶子最多（6 片），剩下的水最少（80 ml）；T 叶子最少（4 片），剩下的水最多（95 ml）。所以叶子越多，剩下的水越少。 Think: S has the most leaves (6) and the least water left (80 ml). T has the fewest leaves (4) and the most water left (95 ml). So more leaves → less water left. 小提醒：叶子越多，植物吸收（失去）的水越多。 Tip: More leaves → the plant takes in (and loses) more water.
第 7 题材料菩提学校 2025 EOY 第 28 题
An experiment was set up using four different materials, P, Q, R and S of the same length and thickness. When a 500 g weight was hung onto each material, it bent as shown below.
The distance bent by the different materials are shown on the table below.
Material
P
Q
R
S
Distance bent (cm)
1
0
4
2
Study the water hose below.
Which of the materials, P, Q, R or S, is most suitable to make the water hose as shown above?
AP
BQ
CR
DS
看答案和讲解
正确答案：C. R
考点材料：柔韧性与用途 · Materials: flexibility and its use
思路：水管要能弯曲卷起来，所以要最有弹性、最容易弯曲的材料。R 弯了 4 cm，最多。 Think: A hose must bend and roll up, so it needs the most flexible material. R bent the most (4 cm). 小提醒：弯得越多 → 越柔韧（flexible）。 Tip: Bends more → more flexible.
第 8 题动植物分类南华小学 2025 EOY 第 12 题
Raju recorded some information on two plants, X and Y, in the table below.
Type of plant
Characteristics
Does it produce fruits?
Is it a water plant?
X
No
Yes
Y
Yes
No
Based on the information from the table, he drew a flow chart as shown below.
Where would Raju place plants X and Y in the flow chart?
X 不结果、是水生植物 → 非开花植物里的水生植物 C。Y 结果、是陆生植物 → 开花植物里的陆生植物 B。 English: X has no fruits and lives in water → non-flowering water plant, C. Y has fruits and lives on land → flowering land plant, B.
第 9 题材料南华小学 2025 EOY 第 17 题
Malan wanted to find out the property of two materials. He prepared two bars, K and L, made of different materials. He tried to bend the two bars by pushing down the two ends of each bar and the results are as shown below.
Bar K
Bar L
Start of the experiment
End of the experiment
Which statement can be concluded from the results of the experiment?
AK is more flexible than L.
BL is more flexible than K.
CK is stronger than L.
DL is stronger than K.
看答案和讲解
正确答案：A. K is more flexible than L.
考点材料：比较柔韧性 · Materials: comparing flexibility
用力压后，K 弯了，L 没有弯。能被弯曲说明 K 比 L 更有弹性/柔韧 (flexible)。 English: When pushed, K bent but L did not. So K is more flexible than L.
第 10 题人体系统南洋小学 2025 EOY 第 20 题
The table shows the processes taking place in organs R, S, T and U. A tick (✓) indicates that the process takes place in that organ.
R
S
T
U
Digestion of food
✓
✓
Absorption of water
✓
Absorption of digested food into the blood
✓
Which of the following correctly shows the parts labelled R, S, T and U?
A
B
C
D
看答案和讲解
正确答案：A.
考点消化系统：各器官的功能 · Digestive system: functions of the organs
思路：R 只吸收水分，是大肠。S 既消化食物又把消化后的食物吸收进血液，是小肠。T 只消化食物，可以是口腔或胃。U 什么都不做，是食道。选项 1 中 T 指口腔、U 指食道、S 指小肠、R 指大肠，全部符合。 Think: R only absorbs water, so it is the large intestine. S digests food and absorbs digested food into the blood, so it is the small intestine. T only digests food (mouth or stomach). U does neither, so it is the gullet. Option 1 matches. 小提醒：食道只运送食物，不消化食物。 Tip: The gullet only moves food along; no digestion takes place there.
