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10 SA1 2018 Mistakes

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Let's learn from the mistakes of other students.
Be sure to get it correct in prelims! 

Question 1 

Topic: Living Together
Common Mistake: Not counting young and adult as 1 population

Answer: 7 population 

1) Plain tiger butterflies + caterpillars
2) Speckled frog + tadpoles 
3) Arrowhead
4) Hydrilla 
5) Water Hyacinth 
6) Fish 
7) Lotus 

Question 2


Topic: Adaptations 
Mistake: Did not use the information from the question 
Answer: Bumps on flippers (found in last sentence of paragraph)

Question 3

Topic: Cells 
Question chosen because it's not common that the questions are tested in this way. 
Good learning point. 

Question 4

Topic: Heat
Common mistake: Confused students / no working / working in the brain thus leading to mistakes.  
Answer: 2 

Question 5

Topic: Heat
Common misconception: Student think that when metal gain heat and expand, the mass increase
Answer: 3






Question 6

Topic: Energy in food 
Mistake: Wrong usage of words. 
Answer: use "lower rate of photosynthesis" instead of "cannot photosynthesize"

Question 7

Topic: Plant Transport system
Common mistake: Most student chose 1 because the concept is that water carrying tubes are still present, so the leaves can still photosynthesise and make food.
Answer: After 14 days, the roots will die because it cannot receive food from the leaves, so water cannot be transport to the leaves and it will wilt. 

Question 8

Topic: Water cycle
Mistake: Confused between the terms 'steam' and 'water vapour'

Answer: 4
During change of state, 2 states are present!

Question 9

Topic: Water cycle
Try to apply the strategy from question 8 that I have shared earlier :)
Answer: 4
(only gaseous state present) 

Question 10


Topic: Water cycle
Mistake: Exposed surface area OF WATER
Missing keyword

If you would like to help your PSLE child who needs a boost in keyword answering, you could check out my previous posts: 

http://acepslescience.blogspot.com/2017/08/psle-last-minute-booster-2017-group-1.html
http://acepslescience.blogspot.com/2017/09/psle-last-minute-booster-group-2.html

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