Q&A - P3 Science
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if the paper clip is one of the parts that made up something … that ‘something’ would be a system not the paper clip … I hope I am right.
e.g a mechanical paper is made up of a different parts e.g. pencil lead, spring, plastic cap, plastic body part. these are parts of the systems that can be assembled to form a mechanical pencil (a non-living system) and this system is used to perform a task (write) -
sorry … the example should be mechanical pencil not paper … typed too fast.
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24by7_mum:
FT said both are systems .. but model answer from assessment book states these are not. So if exam has such questions, who should I follow ? :?A system is made up of different parts that work together to perform a task. e.g. torch, handphone, bicycle.
Don't think paper clip or plastic bag is a system. -
then I think must refer back to the science text and see how a system is defined.
is this in p3 science? -
if FT says both are systems; I guess it’s better to understand from the teacher why it is so.
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24by7_mum:
if FT says both are systems; I guess it's better to understand from the teacher why it is so.
According to FT, plastic bag has 2 parts.. one is compartment & the other is handle.
For paper clip, we need 2 ends to clip a paper.
I thought for it to be called a system, we need at least 2 different ( physical ) parts .
:? -
Can someone kindly help me with this question on Material:
Ships are made of heavy metals such as steel. Explain why they are able to float. TIA -
Pls help;
Draw a simple diagram to show life cycle of a garlic bulb.
I googled and cant find any good answer!! HELP… -
Just4Good:
wah...my plastic bag = those tear off at supermart for fruit and vege!!24by7_mum:
if FT says both are systems; I guess it's better to understand from the teacher why it is so.
According to FT, plastic bag has 2 parts.. one is compartment & the other is handle.
For paper clip, we need 2 ends to clip a paper.
I thought for it to be called a system, we need at least 2 different ( physical ) parts .
:? -
bebebub:
A ship can float because the total volume of the ship is very big, which is made up of the steel and the air space in the ship. This increase in volume of the ship makes the mass per unit volume (called density) of a ship smaller than the mass per unit volume of water. For example, 1 cubic metre of water weighs 1 ton. If 1 cubic metre of a ship is say 0.5 ton, than the ship will float.Can someone kindly help me with this question on Material:
Ships are made of heavy metals such as steel. Explain why they are able to float. TIA
When the air space inside the ship is replaced by cargoes, the density of the ship will increase because cargoes is heavier than air. So a ship can only be loaded to a limit where the density i.e. 1 cubic metre must be less than 1 ton. Otherwise it will sink.
In short, a ship is able to float because a large part of its volume is filled with air, which is much lighter than water.
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