Q&A - P3 Science

[shirley.020816tamzil]

tianzhu:

shirley.tamzil:

I don't really understand the answer, can anyone clarify?

Hi

In answering this question, a student needs to have knowledge of the human respiratory system.

It’s helpful to read your textbook or guidebook(MC) to get some brief notes about the parts and functions of the respiratory system.

The diagram in the question shows the balloon model of a lung in a bottle.
The plastic tube acts as a windpipe and air tubes. The balloons resemble the lungs. The rubber sheet acts as a diaphragm and the inside of the bell jar represents the chest cavity.

When the rubber sheet is pulled downwards, the volume of the inside of the bell jar is increased. This decreases the air pressure inside bell jar so it is lower than the air pressure of the surrounding air. As air flows from a region of higher pressure to a lower pressure region, air flows through the plastic tube into the balloons, thus inflating them.

This is similar in nature when we are breathing in or inhaling.

Hope this helps.

Best wishes

Thanks for the clear explanation.

[tianzhu]

rrjan:

thanks for your kind response, tianzhu

Hi

You're welcome.

Best wishes

[tianzhu]

shirley.tamzil:

Thanks for the clear explanation.

Hi

You're welcome.

Best wishes

[smartmummy]

veraclari:

Dear Parents,


Am trying to get my P3 kid interested in Science. Anyone has simple - do at home - experiments to recommend?

I've tried dissolving sugar and Melting of ice, planting seeds. Anything else you can recommend?

Thanks In Advance!!!

i did these in kindergarten.Again with my DD she in k1,so my son also see.May we can go beyond than that,my son attempt make a circuit with two lemons but failed.We did use battery and made successfully a simple circuit when he was in pri 1.

U can make volcano using vinegar and baking soda.If you mix together in a bottle then the bubble come out from the bottle.

[smartmummy]

Put the egg in a tap water and observe then put some salt and stir well then put the egg then observe.The egg sink in the tap water and float in the salty water.


Put an egg in the hot water then observe .bubbles come out from the egg cos egg shelll has more tiny holes.

[smartmummy]

Hi veraclari!

u can find some books under science section do experiments at home using household things.

[shirley.020816tamzil]

Which part of a plant is needed to make food?

1. Flower
2. Roots
3. Leaf
4. Stem

DS answered 3. Leaf, but the answer sheet shows 1. Flower as the answer. Not sure why, so would like to check with the experts here. Thanks/

[tianzhu]

shirley.tamzil:

Which part of a plant is needed to make food?

1. Flower
2. Roots
3. Leaf
4. Stem

DS answered 3. Leaf, but the answer sheet shows 1.

Hi

Your DS’s answer is correct.

Best wishes

[pingathot]

Hi

Answer is Leaf.

[busybee]

Hi, would like to check with parents here any of their child being taught the CICA method use in answering sect b. C=choice I=interpret data from table C=conclude and A=apply.

TIA