Q&A - PSLE Science

[savoury sweet]

Michaelia0816:

Cats do not have 3 stages, eg like human, why we are instead called as 2 stages but no 3 stages, since we also started as egg, the egg is ..... Internal fertilisation . Pls tell your turor that she or he is wrong, should check the TB!

It doesn't make sense at all!

Really, ok thanks. Btw what is TB ?

[atutor2001]

Michaelia0816:

Cats do not have 3 stages, eg like human, why we are instead called as 2 stages but no 3 stages, since we also started as egg, the egg is ..... Internal fertilisation . Pls tell your turor that she or he is wrong, should check the TB!

It doesn't make sense at all!

Not sure if you are using \"My Pal\" science text book. I remembered it is stated in that book that man/mammal has 3 stages life cycle.

There is no requirement that the life cycle can only start outside the body. The fertilised egg (embryo/foetus) in the womb is the first stage.

[G Tan]

savoury sweet:

Michaelia0816:

Cats do not have 3 stages, eg like human, why we are instead called as 2 stages but no 3 stages, since we also started as egg, the egg is ..... Internal fertilisation . Pls tell your turor that she or he is wrong, should check the TB!

It doesn't make sense at all!

Really, ok thanks. Btw what is TB ?

TB is textbook

[kiasuaunt]

Michaelia0816:

Cats do not have 3 stages, eg like human, why we are instead called as 2 stages but no 3 stages, since we also started as egg, the egg is ..... Internal fertilisation . Pls tell your turor that she or he is wrong, should check the TB!

It doesn't make sense at all!

Hi - from PSLE Ultimate Science : Most animals including fish, mammals, reptiles and birds have simple 3-stage life cycles, namely before birth, young and adult.

From My Pals are here PSLE Rev guide : The lifecycle of a mammal consists of 2 stages.

[Michaelia0816]

Thanks G Tan.

[Michaelia0816]

Just not sure about this conversion of energy


Q: What energy changes took place when the clockwork wind up toy came to the edge of the tables and fell off?

A: []------>[]------->[]+[_]


Please answer it.

[Michaelia0816]

Also, this 2 questions,

http://t.co/zp2bS0Xu
http://t.co/SHesLkmn

[Michaelia0816]

Another 2 question,

http://t.co/shusXAmS
http://t.co/ijxIRF79

[bestwishes]

http://i48.tinypic.com/6z4sax.png\"> What do you think about the suggested ans as shown?

[cimman]

bestwishes:

http://i48.tinypic.com/6z4sax.png\"> What do you think about the suggested ans as shown?

I have not seen the entire question, but it would seem that the material used to contain liquid should be non porous. This material property is a critical criteria for liquid containment.