PSLE Science Academic Coaching

After Science CA1, we looked through and analysed the papers of the students and there are some mistakes that most students get it wrong over and over again in PSLE science across all P4, P5, P6 students.  We have decided to share them with you and may the mistake / misconception get recified once and for all.  PSLE A* Science for the win! For a better view of the questions and answers, you may download the document here . Feel free to post your questions to us if you have any. :) Common Mistake 1 Topic: Matter (Primary4 Science) Qns: An air pump is used to pump air into a tank through an inlet as shown below. The  tank  and  air pump  have a capacity of  500cm³  and  150cm³  respectively. Kaizer added  200cm³ of water  into the tank.  He then pushed the plunger of the air pump 5 times. What is the  volume of air in the tank  now? Mistake: 750cm³ Misconception: (amount of air in air pump - 150 cm³) X (5 times) = 750cm³ Actual Answer:  30

The blood is generally make up of 4 components 1. Red Blood Cells Red Blood Cells  transport oxygen  and  carbon dioxide . It is involved in  gaesous exchange  in the air sacs of lungs as well as in cells during  respiration . Red blood cell is a special animal cell that contains  NO NUCLEUS . Hence it cannot undergo cell division to replicate itself.  To ensure continuity of red blood cells , the body made them in the bone marrow.  Red blood cell is  bi-concave in shape . Together with its shape and without any nucleus, the red blood cell is able to have  higher contact surface area  with the gases and hence  transport  the  gases   more efficiently . 2. Platelets The main function of platelets is to  clot blood . By clotting blood, we will  stop blood flow  and preventing excessive blood loss. When we have a cut or a broken blood vessel, platelets are activated. Fibrin, a network of fibres, is also formed around the platelets. The platelets then clump together to

Topic: P5 Science (Reproduction of Flowering Plants with Modified 2013 PSLE Science Question)  For flowering plants, pollination and fertilisation need to take place in flowers before flower can bear into fruits. Pollination  is the  transfer  of  pollen grains  from  anther  of a flower to the  stigma  of the same flower or a different flower of the  same kind . Anther  is the  MALE  part of the flower that  produces and stores pollen grains. Stigma  is the  FEMALE  part of the flower that  receives pollen grains.  (stigma can be remembered as sticky mama :P) Pollination can be carried out with the help of  wind  or  animals  including  insects  or  birds . Generally these animals feed on nectar in the flower. Animals-pollinated flowers generally have the following features: Brightly colour petals  to attract animals Big flowers  or  small cluster flowers  to attract animals Scented  flowers to attract animals Have  nectar  to attract animals