Q&A - P3 Science

[teh_oh]

Champion:

teh_oh:

Hi Parents,

Can someone explain to me while fish in a fishbowl will swim towards the surface of the water for air due to insufficient dissolved air in the water, do fishes in the ocean behave the same way?
Many thanks.

May I try to answer:
The answer is No - because inside the ocean, there is already dissolved oxygen and the dissolved oxygen allows aquatic animals to participate in the process of respiration (namely, breathing), and in turn, allows them to live.

Sorry, may I ask is this a P3 Question and where did you get it from?

Hi Champion,
Thanks for your replies. Why do ocean already have dissolved oxygen and a tank of water does not? Is it because of the presence of natural aquatic plants in the ocean?

This question is posed to me by my child.... :oops:

----------------------------

Hi Champion,
Just found this when I googled for information. Really answered my questions.

The “surface water” of the ocean is where O2 is collected; water exposed to the surface atmosphere on top absorbs O2, and then as the ocean moves, the water is circulated into the deeper depths in a constant process.

Also.
Aeration occurs at the water surface and then the oxygen is moved deeper via various currents (ex. waves). Also the density of population in the ocean is a fraction of what it is an aquarium...

http://answers.yahoo.com/question/index?qid=20110406075416AACOSEA

Should have checked first before asking. Sorry. :oops:

[teh_oh]

Hi guys/gals,


Child asked me, what insect is \"P\". Can anyone help me?

http://postimage.org/image/1n1i6a0is/

Many thanks.

[Champion]

teh_oh:

Hi guys/gals,


Child asked me, what insect is \"P\". Can anyone help me?

http://postimage.org/image/1n1i6a0is/

Many thanks.

Hi teh_oh,
My gal's answer is: termite. Both P(termite) and Q(cockroach) are insects and so based on observation, her answer is both have six legs. Correct?

[teh_oh]

Champion:

teh_oh:

Hi guys/gals,


Child asked me, what insect is \"P\". Can anyone help me?

http://postimage.org/image/1n1i6a0is/

Many thanks.

Hi teh_oh,
My gal's answer is: termite. Both P(termite) and Q(cockroach) are insects and so based on observation, her answer is both have six legs. Correct?

Hi Champion,
Yes, answer is correct. But looks like termite meh? I thought termites look more like ants (ie with rounded bottoms :oops:).

[Champion]

teh_oh:

Champion:

[quote=\"teh_oh\"]Hi guys/gals,


Child asked me, what insect is \"P\". Can anyone help me?

http://postimage.org/image/1n1i6a0is/

Many thanks.

Hi teh_oh,
My gal's answer is: termite. Both P(termite) and Q(cockroach) are insects and so based on observation, her answer is both have six legs. Correct?

Hi Champion,
Yes, answer is correct. But looks like termite meh? I thought termites look more like ants (ie with rounded bottoms :oops:).[/quote]Hi teh_oh,
DD1 match the picture P with the diagram shown below - taken from Science Partner - A Complete Guide to Lower Block Science 3/4 and comes with the conclusion that it is a termite

She goggle in the net for difference/similarity between termites and ants and found this & the picture: http://animals.howstuffworks.com/insects/termite5.htm

1) Ants have a narrow waist. Termites do not.

2) Ants' front wings are significantly longer than their back wings. Termites' wings are the same length, and they can fold straight back down the length of the termite's body.

3)Ants' antennae are bent. Termites' antennae do not bend, and they look like a very fine string of pearls.

http://postimage.org/image/nna5vk1w/

[atutor2001]

teh_oh:

Hi guys/gals,


Child asked me, what insect is \"P\". Can anyone help me?

http://postimage.org/image/1n1i6a0is/

Many thanks.

Insect P is probably a dragonfly nymph. It has distinct \"wing structure\" of a dragonfly nymph.

[teh_oh]

Hi Champion,

Luckily schools do not require students to identify these insects. As long as they have 3 segmented bodies and 6 legs, they are insects.

Hi atutor2001,
Thanks for the headsup. I search for 'dragonfly nymph' pictures and looks like it closely resemble the picture that I had posted.

http://www.lcbp.org/graphics/nymph.jpg

[Champion]

teh_oh:

Hi Champion,

Luckily schools do not require students to identify these insects. As long as they have 3 segmented bodies and 6 legs, they are insects.

Hi atutor2001,
Thanks for the headsup. I search for 'dragonfly nymph' pictures and looks like it closely resemble the picture that I had posted.

http://www.lcbp.org/graphics/nymph.jpg

Hi teh_oh,
Pai Say yo - maybe my DD1 is wrong and so is mummy here ...

Am so grateful to be able to learn from all parents / teachers here! :thankyou:

[teh_oh]

Hello, it's me again. :oops:


Taken from one of the past year paper.

http://postimage.org/image/6jvq97j8/

While I had taught my child the elimination method to rule out (1),(3) and (4), does mould grow on 'living things'? I thought they grow on dead/rotten stuff. Bread is not a living thing too.

My other personal question is, why do mould grow on damp walls? Walls are not food.... :?: Need enlightenment here...Thanks.

[atutor2001]

teh_oh:

I thought they grow on dead/rotten stuff. Bread is not a living thing too.


My other personal question is, why do mould grow on damp walls? Walls are not food.... :?: Need enlightenment here...Thanks.

Molds do feed on living thing. Some fungal infections of the skin are caused by certain molds growing on the skin.

Molds grow well in the presence of water and warm. As they are micro-organism and feed on any organic matter, any dirt/stain left on a damp wall will be adequate for them to thrive and multiply.