I heard there was a woman named Rosy involved in the discovery of the DNA double helix. Who was she...
My grade 10 biology teacher tells us that blood comes in different shades of red (dimmer and...
How does a lightstick work, and what are the chemicals involved?
Why are there no penguins in the Arctic, or anywhere in the Northern Hemisphere?
Does light exert force?
Lee Ming Fei
Why does chalk, a cylinder, always break into three pieces when it falls, and not into two or four...
justine van der Werf
I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...
from Guwahati, Assam, India
Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...
Can you tell me what the exact pH of the acid in our stomach?
Loubelle I. Depita
from Koronadal City, South Cotabato, Philippines
Why are egg & milk used as antidotes for heavy metal poisoning and what other household remedies...
from Morris Plains, NJ
Why is the helical content higher in gelatin with higher molecular weight. In other words, it seems...
Can air in the pleural cavity cause the lungs to expand more fully than they normally would?
How would Giant Pandas being killed off affect my life?
When and how was the kaleidoscope made?
When does each organ system of the human body reach full maturity?
Why do we have five fingers? My idea is that one of nature's themes is "having enough." It's like a...
Grade One, Chesterville Public School
from Chesterville, Ontario
What do you feed baby praying mantises? We found a mother praying mantis who laid an egg sack on a...
How can I find out whether it takes more effort (work by pump) to increase the air pressure in a...
What kind of weather is on Mercury and Saturn? Does it rain or snow on these planets?
from Andradas-MG- Brazil
When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...
I've been doing a science fair project testing the effectiveness of Lactaid(TM) lactase. From a...
I am doing some research on microarrays. I wish to know if mRNA's also have open reading frames as...
If a sound is played to a person over a period of time, is there a way to work out (or to estimate)...
from Los Angeles
Why do dry cell batteries (rechargeable) need to be fully drained before they can be recharged?
In science fiction it is common to see P-P fusion, but my reading seems to indicate it is...
In Chemistry today, we learned that when HCl is ionized in water, the H2O becomes H3O+, because of...
I am interested in finding more information on how to detect the presence of arsenic in the foods...
from lahore, pakistan
There is a controversy among my collegues that during agarose gel electrophoresis the band that...
Why do wet objects shine?
Why do we yawn when we see someone else yawn? Why is it contagious?
I have a physics paper here (don't worry i am not asking you for the answers!) that says each U-235...
Are light and matter the same thing? Can you get matter from light?
Is calcium carbonate (ground limestone) biodegradable? Will it break down during composting? I want...
If neutrinos have mass, as now seems to be the case, they cannot travel at the speed of light …...
Is gravity considered to be one of the forms of energy such as electricity, heat, light,...
Is it possible to test for, and diagnose, mitochondrial disorders, after death? How? Can this be...
Why does HIV form resistance to ARV so quickly? HIV reproduces itself millions and millions of...
from Orange City, Florida
I have always heard that distilled water is a poor conductor of electricity. Is this true and if...
I've a question about solublity, water, and cyclohexanone. Water has a certain solubility in...
Why does an atom have neutrons and why does a specific atom have a limited amount of isotopes. For...
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