ParentingChildren:

adellwong:

What is the purpose of putting ice cubes on the plastic sheet?

DN (=Darling NIece) 's answer: To lower the temperature of the plastic sheet.

State the 4 major changes that have led to the water droplets being formed.
DN's answer: Hot water evaporates to form water vapour.
Plastic sheet loses heat to the ice.
Water vapour loses heat to the cooler part of beaker and plastic sheet
and condenses to form water droplets.

Is my niece's answer acceptable?

Your niece's answer is generally acceptable. The ice cubes are to lower the temperature so that the water vapour has something cool to condense on.

The rest of her answers mention the 4 major changes that have taken place. Great job!

ParentingChildren:
Thanks for your help Both of of us thought it was too lengthy. DN insisted her teacher said the correct way of answering is 'something lose/gain heat...... water vapour/water droplets formed'.

I have to admit the kids are having a harder time compared to us. I don't remember my PSLE being so difficult

Hi, I'm new here. Would like some help from the members on this P5 water cycle question. I'm very out of touch with science and it's been an uphill task for me and my SIL coaching my niece for this subject. Your help is greatly appreciated


source: http://www.oldschool.com.sg
Primary 5 Science (2010) : Matter - Water (Free Response Q10)

Johnathan used the set-up below to show the water cycle. He later observed that there were droplets of water formed at the underside of the plastic sheet and at the inner sides of the beaker.


http://www.flickr.com/photos/59692876@N05/

What is the purpose of putting ice cubes on the plastic sheet?
DN (=Darling NIece) 's answer: To lower the temperature of the plastic sheet.

State the 4 major changes that have led to the water droplets being formed.
DN's answer: Hot water evaporates to form water vapour.
Plastic sheet loses heat to the ice.
Water vapour loses heat to the cooler part of beaker and plastic sheet
and condenses to form water droplets.

Is my niece's answer acceptable?