Q&A - PSLE Science

[Studious Alien]

Can someone please help me with this question?


Which two materials, metal or plastic, would be better to be used to make a container which is supposed to keep food warm? Why?

TIA

[ms_lim]

Can help me with the question below :


http://i47.tinypic.com/2zfvjv7.jpg\">
Ans key is 3

[ms_lim]

Can help to explain below question :


http://i47.tinypic.com/2ikqcz5.png\">

Ans key is 1 but DS ans is 2

[ms_lim]

Can help me to explain below question :


http://i47.tinypic.com/25fq6jd.png\">
http://i46.tinypic.com/30lp43s.png\">
Ans key is 2. Why is image D not a possible shadow?

[G Tan]

ms_lim:

Can help me with the question below :


http://i47.tinypic.com/2zfvjv7.jpg\">
Ans key is 3

Answer is 4

[whitety]

G Tan:

ms_lim:

Can help me with the question below :


http://i47.tinypic.com/2zfvjv7.jpg\">
Ans key is 3

Answer is 4

I thought tadpoles eat algae so I googled and found this.

\"When a wild pond tadpole is newly hatched, the first thing it will eat is its egg jelly. As they get a little bigger and start to develop they will nibble on pond algae that grows in the shallows of the pond along the edges. They will also move onto larger leaves or the stems of nearby plants. When they are a little bigger and developed they will adapt a more carnivorous diet by eating dead fish, dead tadpoles or worms.\"

So answer may be 3.

[ms_lim]

whitety:

G Tan:

[quote=\"ms_lim\"]Can help me with the question below :


http://i47.tinypic.com/2zfvjv7.jpg\">
Ans key is 3

Answer is 4

I thought tadpoles eat algae so I googled and found this.

\"When a wild pond tadpole is newly hatched, the first thing it will eat is its egg jelly. As they get a little bigger and start to develop they will nibble on pond algae that grows in the shallows of the pond along the edges. They will also move onto larger leaves or the stems of nearby plants. When they are a little bigger and developed they will adapt a more carnivorous diet by eating dead fish, dead tadpoles or worms.\"

So answer may be 3.[/quote]Thx G Tan and whitety. But cat does not have 3 stage life cycle. So I am confused with which is correct ans.

[G Tan]

whitety:

G Tan:

[quote=\"ms_lim\"]Can help me with the question below :


http://i47.tinypic.com/2zfvjv7.jpg\">
Ans key is 3

Answer is 4

I thought tadpoles eat algae so I googled and found this.

\"When a wild pond tadpole is newly hatched, the first thing it will eat is its egg jelly. As they get a little bigger and start to develop they will nibble on pond algae that grows in the shallows of the pond along the edges. They will also move onto larger leaves or the stems of nearby plants. When they are a little bigger and developed they will adapt a more carnivorous diet by eating dead fish, dead tadpoles or worms.\"
Cat has 2 stages and tadpole does not look like adult, so best answer is 4

So answer may be 3.[/quote]

[whitety]

Agree. Best answer is 4. Cats do not have 3 stages life cycles. I overlooked that point earlier.

[whitety]

When my dd came back from school, I asked her how many stages of life cycle does a cat have? She said her school teacher taught her that a cat can have 2 or 3 stages, both answers are acceptable.


So now i’m confused too!