Q&A - P3 Science

[Full.010894Cream]

I was also pondering on how to look at this question from a P4 POV.


1) ice should start at 0 deg C. This rules out (4)

2) water in the tt will start to cool down but will not drop below 0 deg C. Only (3)

[Lynn2]

Hi atutor


thanks and noted.

Hey, can check with ks members here, on http://www.misskoh.com/07/primary4-aitong-science.pdf

question 37 a?appreciate someone can explain to me why .thanks

rgds

[atutor2001]

Lynn2:

Hi atutor


thanks and noted.

Hey, can check with ks members here, on http://www.misskoh.com/07/primary4-aitong-science.pdf

question 37 a?appreciate someone can explain to me why .thanks

rgds

The limewater will turn chalky.
The wooden box does not allow light to pass through.
Without light, the plant cannot photosynthesize but continues to respire.
Carbon dioxide is given out during respiration which turns the lime water chalky.

[tianzhu]

Thank you for your help.


Which properties of the brown gas are shown by the above experiment?
A: It can be compressed.
B: It has no definite shape.
It has no definite volume.

A.A only
B.A and B only
C.B and C only
D.A, B and C only

http://farm4.static.flickr.com/3539/3499368658_ae0f175df7_o.jpg\">

[Lynn2]

One question to ask ks member here…


The table below shows the melting points of substances P,Q,Rand s.

Substance Melting point (deg cel)

p 49
q 5
r 23
s 0

At 20 deg, which of the above substances would have changed from a solid state to a liquid state?
p only q only
p and r only q and s only

Can check what is substance p and r are?

what is 20 deg to 49deg and what is 20 deg to 23 deg as in what state is that?thanks

rgds

[Lynn2]

one more


Below shows the number of days of each stage in the life cycle of an insect.
Egg 10 days
Nymph 12 days
adult male 11 days
adult female 8 days.

How many days would the insect take to become an adult after the egg is hatched?

6 days
8 days
10 days
12 days

My girl answer is 10 days which is wrong.thanks

[watmekiasu]

My answer would be 12 days. It takes 10 days for the egg to hatch which produces a nymph. The nymph takes 12 days to grow to adult stage.

[Full.010894Cream]

Lynn2:

One question to ask ks member here....


The table below shows the melting points of substances P,Q,Rand s.

Substance Melting point (deg cel)

p 49
q 5
r 23
s 0

At 20 deg, which of the above substances would have changed from a solid state to a liquid state?
p only q only
p and r only q and s only

Can check what is substance p and r are?

what is 20 deg to 49deg and what is 20 deg to 23 deg as in what state is that?thanks

rgds

try to relate this to something familiar, eg, ice which melting point is 0 deg C.

when temp is anything higher than its melting point, eg, 20 deg C, the ice (s) will start to melt. Similarly, 20 deg is also higher than q's melting point so it'll also melt.

Since substance p & r only melt at higher temp than 20 deg C, it'll remain as solid.

Not important what they are as this is a test for the understanding of melting point.

[acforfamily]

Hi,

Can someone advise whether a centipede has 6 legs or more? According to my son, teacher told him that the rest of the centipede ‘legs’ are actually muscles and not legs.

And if they are actually legs, are they considered insects? Insects have only 6 legs per definition for P3.

Thanks in advance.

[watmekiasu]

A centipede has 2 legs on each body segment. It also has more than 3 segments. Hence it is not an insect.