Q&A - P3 Science

[atutor2001]

teh_oh:

(1) what does mushroom uses 'air' for?
(2) what do they use to take in 'air' (ie plants use leaves, we use nose/lungs, fish use gills).

Hi teh_oh

(1) Like all living things, mushroom needs oxygen to carry out cellular respiration to breakdown food (carbohydrate / glucose) into energy which is needed to stay alive. (I think it is covered in P5)

(2) There is such process called \"diffusion\" where oxygen from the atmosphere can enter the cells directly. Therefore, the mushroom can carry out gaseous exchange directly with the atmosphere, taking in oxygen and giving out carbon dioxide. For primary school, a common question is \"which part of the cells allow the cell to respire?\" and the answer is \"cell membrane\" which allows oxygen to enter the cell and carbon dioxide to leave the cell.

Hope it helps.

[teh_oh]

atutor2001:

teh_oh:

(1) what does mushroom uses 'air' for?
(2) what do they use to take in 'air' (ie plants use leaves, we use nose/lungs, fish use gills).

Hi teh_oh

(1) Like all living things, mushroom needs oxygen to carry out cellular respiration to breakdown food (carbohydrate / glucose) into energy which is needed to stay alive. (I think it is covered in P5)

(2) There is such process called \"diffusion\" where oxygen from the atmosphere can enter the cells directly. Therefore, the mushroom can carry out gaseous exchange directly with the atmosphere, taking in oxygen and giving out carbon dioxide. For primary school, a common question is \"which part of the cells allow the cell to respire?\" and the answer is \"cell membrane\" which allows oxygen to enter the cell and carbon dioxide to leave the cell.

Hope it helps.

Hi atutor2001,
:thankyou:

[IJJ]

teh_oh:

Q4

http://postimage.org/image/2ylr3dyis/
Child's (and husband's) Answer: 2; Answer Key: 3
Is the answer key wrong?

Many many thanks in advance!

I say 2. How can iron ball float? Wood floats.

[teh_oh]

IJJ:

teh_oh:

Q4

http://postimage.org/image/2ylr3dyis/
Child's (and husband's) Answer: 2; Answer Key: 3
Is the answer key wrong?

Many many thanks in advance!

I say 2. How can iron ball float? Wood floats.

Hi IJJ,
That's what my son told me. :oops:
That is the downside of working on past year papers; the answer key for MCQ alone for this particular paper has 3 errors.

[IJJ]

teh_oh:

Q1
http://postimage.org/image/2c3ahkfyc/
Child's Answer: 1; Answer Key: 3
Child's Q: While plant need air to respire and the glass tank has air supply given out by the plant,
(1) do mushroom need air to survive?
(2) what do mushroom uses air for?
(3) if mushroom does not respire the same way as plant ie gives out oxygen, how can it remain alive after five days?

Asked my girl these questions. For this, she also said 1. She said plants consume oxygen and give out carbon dioxide in the day and go through photosnythesis in the night, so in a way, the plant in the glass tank is able to exchange the types of gas it needs for days. As for mushrooms, she thinks they need both oxygen and carbon dioxide concurrently, and by placing the tank near window, they would not grow well under heat and direct sunlight.

teh_oh:

Q2
http://postimage.org/image/2ylm4rx1g/
Child's (and my eventual) Answer: 3; Answer Key (and Husband's and my first answer) : 1
Child's Reason: Mushroom is not a plant, so Ans 1 is wrong.
Please confirm if we are on the right track.

She said 3 too. Mushrooms are fungi, not plant, and birdnest ferns are non-flowering plants.

[S6169]

teh_oh:

Hi Parents,

Need your assistance again.

Q1
http://postimage.org/image/2c3ahkfyc/
Child's Answer: 1; Answer Key: 3
Child's Q: While plant need air to respire and the glass tank has air supply given out by the plant,
(1) do mushroom need air to survive?
(2) what do mushroom uses air for?
(3) if mushroom does not respire the same way as plant ie gives out oxygen, how can it remain alive after five days?

This link may give a better answer of your child's questions.
http://en.wikipedia.org/wiki/Fungiculture

[teh_oh]

S6169:

teh_oh:

Hi Parents,

Need your assistance again.

Q1
http://postimage.org/image/2c3ahkfyc/
Child's Answer: 1; Answer Key: 3
Child's Q: While plant need air to respire and the glass tank has air supply given out by the plant,
(1) do mushroom need air to survive?
(2) what do mushroom uses air for?
(3) if mushroom does not respire the same way as plant ie gives out oxygen, how can it remain alive after five days?

This link may give a better answer of your child's questions.
http://en.wikipedia.org/wiki/Fungiculture

Hi S6169,

Thank you! :celebrate:

[super-duper-quadruple]

Is the following statement about bread mould true or not?



It will die when the air around becomes warm.


Thanks

[S6169]

super-duper-quadruple:

Is the following statement about bread mould true or not?



It will die when the air around becomes warm.


Thanks

I think is false. Because mould need moist and warm to growth.

[greenbean2011]

is there any good book around on Misconceptions in Science ? can recommend ?