Science tip: Question: Is a helium or hot air balloon affected by gravitational force? Ans: Yes it is! All objects (with mass) in the Earth’s gravitational field are affected by gravity. This includes objects that are lighter than air. The reason hot air balloons float is not because they are weightless, it is because they[…]
Science tip: Many schools have workshops for parents of P5 and P6 students. Here are two presentation slides that may be useful. http://www.rivervalepri.moe.edu.sg/wbn/slot/u1724/Dept/Science/P5n6%20Science%20parents%20workshop%202%201.pdf http://www.radinmaspri.moe.edu.sg/wbn/slot/u3201/Presentations/Answering%20Science%20Process%20Skills%20Questions%20(P5%20%26%20P6).pdf
Science tip: For open ended questions, look at the first word of the question. It tells you a lot about what is the expected answer and what you need to do.
Maths tip: Here’s another step by step model drawing example. Question: Betty Siti and Meiling had $5000 altogether. Betty spent 2/5 of her money and Siti spent $500. The ratio of the amount of money Meiling spent to the amount of money Betty spent was 3:4. In the end, they had the same amount of[…]
Science tip: Here’s a very interesting question. Some people answered (1), some people answered (2). Some teachers can’t explain why. The answer is (2). The reason is because we don’t know why the bulb doesn’t light up. It could be due to A. It could be due to B. It could be due to a[…]
Maths tip: Another area question that seems to be quite popular. 2 solution methods are presented 🙂
Maths tip: Area problems can be challenging. One way to tackle these is to familiarise yourself with some of the problems and get an idea of how to solve them. Here’s one example. Try it!
Science tip: All objects at the same place experience a gravitational FORCE (or pull) that is proportional to its mass. So the larger the mass, the larger the gravitational force. This force is there regardless of the speed or orientation of the object. It is there whether the object is flying or falling, whether it’s[…]
Science tip: Friction is independent of the surface area! It may sound counter-intuitive, since increasing the contact area would create a larger source of frictional forces. However, it also reduces the pressure between the two surfaces for a given force holding them together. Since pressure equals force divided by the area of contact, it works[…]
Maths tip: For ratio problems where there are three groups of items with two ratios given – it is usually the case that you’ll need to express them into a common ratio. Here’s an example: "A fruit seller had some oranges, pears and mangoes. After selling some of them, there were 6 pears for every[…]