Q&A - P3 Science

[rains]

tianzhu:

The teacher’s answer is correct.


What does the experiment above show about magnets?

This question asked for the conclusion of the experiment not the prediction or hypothesis before carrying out the experiment.

Best wishes

At P3, are we really so particular about whether the child is phrasing in a 'prediction mode' or 'conclusion mode'? It'll be scary if it is. The key phrase 'lost its magnetism' is already there. If the teacher really gives such a reason, I must say the teacher is really lame.

[Tang]

tianzhu:

Hi

The teacher’s answer is correct.

What does the experiment above show about magnets?

This question asked for the conclusion of the experiment not the prediction or hypothesis before carrying out the experiment.

Best wishes

I have spoken to my best friend this morning. He suggested that since the magnet still can attract iron nails (but fewer), it is best to retain the keywords 'heated' and 'loses magnetism' and yet to meet the condition given by adding 'some of' as follows:

When heated, the magnet loses some of its magnetism.


With the suggested answer, we are likely not to lose any mark.

[atutor2001]

tianzhu:

Perhaps, the following links will provide useful information on the reproduction and root system of sweet potatoes. The answer given in the WS is correct.

http://www.science.edu.sg/ssc/detailed.jsp?artid=1513&type=6&root=2&parent=2&cat=18

Hi tianzhu

After reading the article that sweet potato plant does not grow from the sweet potato itself, I was surprised because I remembered planting a sweet potato patch from sweet potatoes.

I googled and found most people recommended using sweet potato to produce sweet potato plants. Below is one of the articles to share with you :
[quote]Sweet potatoes are usually grown from slips; small rooted pieces of tuber. You can create your own slips by slicing a sweet potato in half lengthwise and placing it on a bed of damp potting soil. Cover the pieces with a few inches of soil and keep moist and warm. Small roots should develop within a few days, followed by leaves. They are ready to be lifted and planted once they’re about 4 - 8 inches tall. (About 6 weeks.) You can try growing sweet potatoes from the grocery store, but the only way to be certain you have certified disease-free roots is to buy them from a reputable seed supplier.[/quote]Regards

[tianzhu]

Hi atutor2001


Thank you for your sharing. Yes, we can grow sweet potato plant from sweet potato. The article from science net has stated this fact.

Another useful link on the growing sweet potato.
http://www.ehow.com/how_2074676_grow-sweet-potato-plant.html

Best wishes

[atutor2001]

tianzhu:

Hi atutor2001


Thank you for your sharing. Yes, we can grow sweet potato plant from sweet potato. The article from science net has stated this fact.

Another useful link on the growing sweet potato.
http://www.ehow.com/how_2074676_grow-sweet-potato-plant.html

Best wishes

Hi tianzhu

I have misread the article to mean that \"since sweet potato has no bud it cannot be used to reproduce\".

Thank you

[glchua]

rains:

At P3, are we really so particular about whether the child is phrasing in a 'prediction mode' or 'conclusion mode'? It'll be scary if it is. The key phrase 'lost its magnetism' is already there. If the teacher really gives such a reason, I must say the teacher is really lame.

There is no difference in meaning between the child's answer and the teacher's answer.

A child would be a real genius if he or she sets out to go into prediction or conclusion mode in his/her answers.

The teacher is in a \"robotic marking\" mode? The teacher was a former lawyer?

[leeven]

My Son Got a Question \"Is Apple a livingthing \" and he wrote yes. but got it wrong. The answer was non living thing.


but being grown from flower to fruit and then have seeds to grow further shouldnt it be a living thing....

please help with some explanation. I am not sure how to explain my boy.
:? & :stupid:

[edanson]

leeven:

My Son Got a Question \"Is Apple a livingthing \" and he wrote yes. but got it wrong. The answer was non living thing.


but being grown from flower to fruit and then have seeds to grow further shouldnt it be a living thing....

please help with some explanation. I am not sure how to explain my boy.
:? & :stupid:

An apple is a living thing only when it is still on a tree. However, when you bought the apple in the market, it would have been a non-living thing. It no longer grow in size ( a condition for being a living thing).

Hope this help.

[jesschan]

glchua:

It is like many science questions I see in primary school, very poorly done. If a student think more, he'll get answers wrong.

My friend was just telling me the other day \"For primary school science, you just need to give a smart answer. Don't try to give a genius answer. \"

[Tang]

edanson:

leeven:

My Son Got a Question \"Is Apple a livingthing \" and he wrote yes. but got it wrong. The answer was non living thing.


but being grown from flower to fruit and then have seeds to grow further shouldnt it be a living thing....

please help with some explanation. I am not sure how to explain my boy.
:? & :stupid:

An apple is a living thing only when it is still on a tree. However, when you bought the apple in the market, it would have been a non-living thing. It no longer grow in size ( a condition for being a living thing).

Hope this help.

Grow in size is not a condition for classifying living thing. My parents do not grow in size, but I do.

Basic needs of living things are air, water and food. Once an apple is plucked, it does not need air, water and food.