twinningtalks\" post_id=\"1910704\" time=\"1558022549\" user_id=\"172357:

I need help on the rationale behind why the answer is (3) for the below question. If the answer is (3), the principle \"Air can be compressed\" does not apply to the balloon. So which principle explains and support the answer below. Thank you so much.

https://postimg.cc/5XHYJqPm

Hi wella! Is your child in P3? I remember seeing a similar question in one of my DS’s homeworks.

Anyway, back to your question. Air has no definite volume; it takes the shape of the container. This means it can be compressed to occupy a smaller space. It also can expand to take up a bigger space.

A balloon is made of material which can be stretched. When you blow air into the balloon, it’ll expand. As more air is blown into the balloon, its volume increases until it finally bursts. The glass ball cannot be stretched when additional air is pumped into it. Hence the air is compressed. The balloon can be stretched to accommodate the extra air, hence the air expands to take the shape of the stretched balloon.

Therefore, Option (3) is correct. Hope this helps!

faithj:

I just got to know about CCE. It looks interesting, but it's only 3 days. Does the CCE teach textbook concepts only? How are the activities like? experiments? Any parent whose child has been through can share more? When is the best time to attend it? my thinking is end of the year is better as it will revise the whole year's work? Most importantly, can it help push grades to A*? I saw most of the improvements were within an A grade.

My neighbour enrolled her son at CCE last year, so I decided I’d try it out with my daughter last June. They have more hands-on activities than worksheets, which appealed more to my daughter. But what I liked most about the experience was they gave customized reports to that show concrete feedback on my daughter’s performance. No two students are alike so I believe improvements depend on one's learning pace. You just have to be patient with your child.