Q&A - P3 Science

[shirley.020816tamzil]

Need help on the below questions:


http://postimage.org/image/1mt34go5g/

[tianzhu]

Hi shirley.tamzil


In primary science, students learnt that bread mould grows quicker in dark, wet and warm conditions.

The toaster heats up the bread and removes the moisture from them; therefore it’s not likely to have moulds after three days. Hence option (1) and (3) are offside.

Between option (2) and (4), I’d go for option (2) because the amount of air in the sealed bag is limited.

Best wishes

[shirley.020816tamzil]

tianzhu:

Hi shirley.tamzil


In primary science, students learnt that bread mould grows quicker in dark, wet and warm conditions.

The toaster heats up the bread and removes the moisture from them; therefore it’s not likely to have moulds after three days. Hence option (1) and (3) are offside.

Between option (2) and (4), I’d go for option (2) because the amount of air in the sealed bag is limited.

Best wishes

I don't understand what you mean when you offside option 1 and option 3.

I thought that since the bread are toasted, so they would be least likely to have mould, so shouldn't the answer be either 1 or 3?

[pertunia]

Sun_2010:

tianzhu:

Hi


There is an advertisement on cookware by Robinsons in ST today. I’ve a stainless steel pan similar to the one in this link.
http://www.wmf.com/pans/stainless-steel-pans_82511326.html?sid=7DC33254-E9A5-4B18-ADEC-733CE7E1DF51

The handle is also made of stainless steel. In primary science, students are usually taught that the handles are made of plastic, wood or rubber so that it’ll not be too hot to hold.

My boy asked me why and we had quite a few interesting moments then.

Best wishes

Hi, I am a newbie to this forum and I have enjoyed reading the discussion that has been going on so far.

I would like to add my two-cents worth to this question. :idea: For cooking pans to be used on the stove, many have insulated handles that allow handling by bare hands. However, for cooking pans for use on the stove as well as cooking in the oven, then cooking pans will need stainless steel handles. Plastic handles will melt in the oven heat. Wood handles will probably crack after several uses in the hot oven heat.

Caucasians usually cook lightly on the stove and then finish off cooking in the oven. Dishes such as a fritata (which is an egg-based dish) will require this type of treatment to set the egg and cheese mixture nicely.

Hope this helps.

[atutor2001]

pertunia:

Hi, I am a newbie to this forum and I have enjoyed reading the discussion that has been going on so far.

I would like to add my two-cents worth to this question. :idea: For cooking pans to be used on the stove, many have insulated handles that allow handling by bare hands. However, for cooking pans for use on the stove as well as cooking in the oven, then cooking pans will need stainless steel handles. Plastic handles will melt in the oven heat. Wood handles will probably crack after several uses in the hot oven heat.

Caucasians usually cook lightly on the stove and then finish off cooking in the oven. Dishes such as a fritata (which is an egg-based dish) will require this type of treatment to set the egg and cheese mixture nicely.

Hope this helps.

Thank you pertunia, never realise that ang mo put their pans in the oven. I only use the oven for baking cake Thank you for the enlightenment.

[tianzhu]

shirley.tamzil:

tianzhu:

Hi shirley.tamzil


In primary science, students learnt that bread mould grows quicker in dark, wet and warm conditions.

The toaster heats up the bread and removes the moisture from them; therefore it’s not likely to have moulds after three days. Hence option (1) and (3) are offside.

Between option (2) and (4), I’d go for option (2) because the amount of air in the sealed bag is limited.

Best wishes

I don't understand what you mean when you offside option 1 and option 3.

I thought that since the bread are toasted, so they would be least likely to have mould, so shouldn't the answer be either 1 or 3?

Hi

The question asks for the least amount of mould growing on the bread after three days.

The toasted bread will not be mouldy as it is dried after heating in the oven.

By heating in the oven, the moisture in bread is removed and bacteria are killed. Therefore it’s less likely for the bread to get mouldy due to the absence of moisture. Hence, option (1) and (3) are offside.

Best wishes

[shirley.020816tamzil]

tianzhu:

shirley.tamzil:

[quote=\"tianzhu\"]Hi shirley.tamzil


In primary science, students learnt that bread mould grows quicker in dark, wet and warm conditions.

The toaster heats up the bread and removes the moisture from them; therefore it’s not likely to have moulds after three days. Hence option (1) and (3) are offside.

Between option (2) and (4), I’d go for option (2) because the amount of air in the sealed bag is limited.

Best wishes

I don't understand what you mean when you offside option 1 and option 3.

I thought that since the bread are toasted, so they would be least likely to have mould, so shouldn't the answer be either 1 or 3?

Hi

The question asks for the least amount of mould growing on the bread after three days.

The toasted bread will not be mouldy as it is dried after heating in the oven.

By heating in the oven, the moisture in bread is removed and bacteria are killed. Therefore it’s less likely for the bread to get mouldy due to the absence of moisture. Hence, option (1) and (3) are offside.

Best wishes[/quote]So if the question is rephrased to \"least likely to have mould\", would the answer be different?

[tianzhu]

shirley.tamzil:

So if the question is rephrased to \"least likely to have mould\", would the answer be different?

Hi

\"least likely to have mould\" has a different meaning from “least amount of mould”.

But, I am not sure if the question would be crafted as such if the setter had wanted to ask for \"least likely to have mould\"

For now, let’s focus on the context of the original question, otherwise it may be confusing for kids.

Best wishes

[shirley.020816tamzil]

Need help with the below:


http://postimage.org/image/2f05v93r8/

[starlight1968sg]

shirley.tamzil:

Need help with the below:


http://postimage.org/image/2f05v93r8/

I think only B WILL germinate.
A will not germinate because no water.
C will not germinate because no oxygen.