Q&A - P3 Science

[shirley.020816tamzil]

shirley.tamzil:

Need help with the below question:


Which of the following statements about heat is correct?
1. Heat travels in a straight line.
2. A thermometer is used to measure the amount of heat of an object.
3. When one object is placed on top of another, the object on top will gain heat because heat rises.
4. At the same temperature, a dark colored object will give out more heat than a light colored object.

The answer given was 4, but I have difficulties explaining why to my P4 DS. Other than eliminating the incorrect answer, can't explain the correct answer.

[atutor2001]

black object absorbs heat faster and also lose heat faster.


many confuse heat with light.

this is not in pr syllabus but always appear in sch questions

[teh_oh]

Hi,

Need some clarifications…
1) What are found on the underside of the leaves of ferns?
Spores or Spore cases?

2) Are there such things as ‘spore bags’?

[atutor2001]

Spore cases containing spores are found on the underside of fern leaves.


If it is mcq, I will pick spores over spore cases (then complain to the teacher :lol: )

[teh_oh]

atutor2001:

Spore cases containing spores are found on the underside of fern leaves.


If it is mcq, I will pick spores over spore cases.

Hi atutor2001,
Thanks. Are there such things as spore bags?
My child wrote in his school science exercise book that spores are contained in spore bags. In his textbook, it wrote spores in breadmould are in spore cases. In an MCQ question where there is an option of spore bags and spore cases, the choice of spore cases is correct. I read one guide book, while it wrote that breadmould spores are contained in spore cases, there is a small picture and at the annotation under the gills of fungus, it state spore bags.
I'm confused.

[atutor2001]

I have not come across the term spore bags which is why I did not attempt to answer your query.


Could it be a case of the teacher explaining that spore cases are like bags that results in the term "spore bags" being found in the exercise book? Nevertheless, I would stick to spore cases.

Cheers

[teh_oh]

atutor2001:

I have not come across the term spore bags which is why I did not attempt to answer your query.


Could it be a case of the teacher explaining that spore cases are like bags that results in the term \"spore bags\" being found in the exercise book? Nevertheless, I would stick to spore cases.

Cheers

Hi atutor2001,
:thankyou:

[usaik]

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Hi, I appreciate kind advice on what should be the correct answer to the above. I do not have the answer key but know that (2) is wrong.

[tianzhu]

Hi


When water is heated to 100 degrees C, it boils.

During boiling, water changes from a liquid to a hot gas called steam which is invisible.

The white clouds or mist are actually tiny water droplets floating in the air. These are formed when steam loses heat to the surrounding air and changes back into water as it cools. The change of state of steam from gas to a liquid is called condensation.

I’d go for steam and water droplets

Best wishes

[Emelyn]

Hi all,


1. Is electricity a matter ?
2. Is wind a matter ?

Some website says electricity is a matter. Some says it is not a matter in everyday sense. So, if the paper asks this question, how to answer ?

Many Thanks !!