nijin from Khd asks

How did dinosaurs die? If they died due to a comet impact on the Earth there will be dust...

George Z from the Internet asks

Many people add mustard to salad dressing (oil and vinegar) in order to render the two usually...

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Rick Anderson asks

Is the air we exhale pure carbon dioxide? If not, then what is it?

Alexandra asks

What's a gathering of frogs called? What's a gathering of toads called?

Cynthia from Chilliwack, Canada asks

IF my blood type is A negative what are my parents' blood types? What does it mean to have negative...

petra from chamblee asks

How long does it take styrofoam to decompose? Are there chemicals that help to cause the...

Zambi Donburi from Brisbane, Queensland, Australia asks

How did we (as a race) evolve eyebrows and eyelashes. The way I understand it is that to evolve...

Atul Mulay asks

What chemical reaction takes place when you use henna to tint skin? Is it possible to extract the...

Terra from Ontario asks

How does sugar conserve food?

Markovic Ljiljana asks

When and how was the kaleidoscope made?

Cathy Schroeder asks

Why do batteries behave differently when kept at different temperatures? In my science project a...

Trevin H. from Rocklin asks

I would like to know the chemical compostion of the venom in a yellow jacket wasp sting, the dosage...

Kyra Nabeta asks

In dealing with bacterial resistance, should doctors use the strongest antibiotics now to kill off...

Mark Seymour asks

Why are there no penguins in the Arctic, or anywhere in the Northern Hemisphere?

Amanda from Calgary asks

I am interested in finding more information on how to detect the presence of arsenic in the foods...

Carla Becker from Dallas asks

If we are making a perfume and we pour alcohol on an orange peel; why would the smell increase the...

George Donati from Andradas-MG- Brazil asks

When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...

Jerry E. Allen asks

Is it possible to freeze water in a vacuum? Is there a chart that shows water temperature vs....

Joaquin Cornejo from Los Angeles asks

Why do dry cell batteries (rechargeable) need to be fully drained before they can be recharged?

Marcel Leone asks

Is gravity considered to be one of the forms of energy such as electricity, heat, light,...

Intruder from Singapore asks

How does a lightstick work, and what are the chemicals involved?

Brooke from the Internet asks

How do you find the solubility of a substance?

Stephen Leece from London asks

I am currently researching how sugar (sucrose) reacts with various chemicals. I am particularly...

David Critch asks

My grade 10 biology teacher tells us that blood comes in different shades of red (dimmer and...

A.E. asks

Why do we have five fingers? My idea is that one of nature's themes is "having enough." It's like a...

Peter Gensch from Auckland, New Zealand asks

Is there an effective and affordable way to kill weeds on an organic basis? (i.e. vinegar?)

Marlene Caissie asks

I heard there was a woman named Rosy involved in the discovery of the DNA double helix. Who was she...

jose from miramar asks

Does fabric softener affect drying time of towels?

Benjamin Raja from Singapore asks

At what speed does the world's slowest living thing travel? And what is the world's slowest living...

Tridib Das from Guwahati, Assam, India asks

Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...

Grade One, Chesterville Public School from Chesterville, Ontario asks

What do you feed baby praying mantises? We found a mother praying mantis who laid an egg sack on a...

Margaret Moore asks

Can you tell me what the exact pH of the acid in our stomach?

bahar from iran asks

We want to know, when we burn NaCl, what happens to Cl?

Jordan Duncan from Prince George, BC Canada asks

I need to know what happens to wood (softwoods, hardwoods and kiln dried woods) when they are...

Aliahs Ahmadzai from Maple Ridge, BC asks

When you get a lighter and get a piece of metal and you turn on the lighter and put it over the...

Ethan Diener asks

If body temperature is 98.6 degrees, why does 98.6 degree water feel hot when you place it on your...

eddie poirier from Orange City, Florida asks

I have always heard that distilled water is a poor conductor of electricity. Is this true and if...

Mike from Brussels asks

I have been doing an experiment in school and I don't understand why the following happens. When we...

Erin Harris asks

How would Giant Pandas being killed off affect my life?