Q&A - P3 Science

[yeomaylin]

gosh, after reading all the above, I truly "freak out". My girl is in P2 and now, I really worry for her Science next year.

[kitty2]

Can anyone help with these 2 questions?Thanks


1) How’s laser light different from the light of a torch?

2)Name some of the ways lasers are used in everyday life.

[Muffins]

DVD player has lasers, printers have lasers, there are so many things that have lasers around us, just pick a few!

[tianzhu]

kitty2:

Can anyone help with these 2 questions?Thanks


1) How's laser light different from the light of a torch?

2)Name some of the ways lasers are used in everyday life.

Hi

You may find out more about laser light in this link.
http://science.howstuffworks.com/laser4.htm

You may also wish to check with your child’s teacher if it is in the science syllabus.

Best wishes.

[kitty2]

tianzhu:

kitty2:

Can anyone help with these 2 questions?Thanks


1) How's laser light different from the light of a torch?

2)Name some of the ways lasers are used in everyday life.

Hi

You may find out more about laser light in this link.
http://science.howstuffworks.com/laser4.htm

You may also wish to check with your child’s teacher if it is in the science syllabus.

Best wishes.

:thankyou: ,You're great!!!! :snuggles:

[leesf]

Hi, would appreciate help on this past year PSLE question.


The freezing point and boiling point of substance X is 40 degree celcius and 180 degree celcius respectively. What is the correct state of substance X at 30 degree celcius & 200 degree celcius?

The answer is liquid & gas.

Shouldn’t it be solid and gas instead?

Thanks

[starlight1968sg]

leesf:

Hi, would appreciate help on this past year PSLE question.


The freezing point and boiling point of substance X is 40 degree celcius and 180 degree celcius respectively. What is the correct state of substance X at 30 degree celcius & 200 degree celcius?

The answer is liquid & gas.

Shouldn't it be solid and gas instead?

Thanks

40 < < 180
S < L < G

We take freezing point the same as melting point.
(Is there a chance or case where the freezing point different from melting point ?)

At 30C, it should be a solid.
At 200C, it should be a gas.

[bitchymum]

tianzhu:

shirley.tamzil:

Need help on the below question.


Name the part of the plant that be can be eaten -
a) water chestnut :

Hi,

In primary science, students learnt that excess food is stored in different parts of plant. They are root, stem, flower and fruit.

The food in water chestnut is stored in the stem.

Best wishes

I think she meant the water chestnut (the ones that we eat) is what part of the plant. It should be stem right? Like carrot is the root of the plant.

[coolit]

bitchymum:

tianzhu:

[quote=\"shirley.tamzil\"]Need help on the below question.


Name the part of the plant that be can be eaten -
a) water chestnut :

Hi,

In primary science, students learnt that excess food is stored in different parts of plant. They are root, stem, flower and fruit.

The food in water chestnut is stored in the stem.

Best wishes

I think she meant the water chestnut (the ones that we eat) is what part of the plant. It should be stem right? Like carrot is the root of the plant.[/quote]Is water chestnut a root or a stem, I am not very sure about the stem vs root thing, is there any notes for this we can look at online?

[bitchymum]

Need help on this


Write down a suitable heading and give one example for each group below:-

[_____________] [___]
Canvas. Copper
plastic. Aluminium
Glass. Gold

. ___________________ (dd’s answer for this is silver)