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Kevin Swope from San Diego/California asks

Why does Aspartame taste so sweet? What is the chemistry involved in something that tastes sweet?

Cheryl from Chesapeake, VA asks

I teach moon phases to my third graders. On posters, in textbooks, and online, I have seen...

Awot Negash from Alexandria, VA, USA asks

What is the relationship between rain intensity/rain rate and visibility? What resources can I...

Rowland Craig from San Antonio, Texas asks

What is the volume of breathable air on the earth? Perhaps as one atmosphere?

Michael Chen from Calgary asks

Is there any evidence that the Green House Effect is not caused by industral gas emissions?

Chelsea Imm from Glandorf, OH asks

Can you please tell me what the basic preservatives are in the following breads: white, wheat,...

Morgan from Ajax asks

If air is a gas, and gas explodes when heated (in an eclosed space, the atmosphere), does that mean...

Laura from Toronto asks

Why does lake water change temperature at a slower rate than the ground?

Kristi from Saskatoon asks

I would like to know how much oxygen is in our breathable air, and also if it has ever been 50%. If...

Gavin Dune from Australia asks

How does the sensory memory help us to hear, read and understand whole sentences? For example. when...

Tracy Weddell from Bakersfield, CA asks

Do neutron stars evolve further? Charts of star evolution always show the neuton star as the last...

nijin from Khd asks

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

Sara from Antigonish, Nova Scotia asks

How does the earth stay in the same place in space?

Will McAbee from Pendlton asks

How does a atom split and how does it create such a big explosion? Also how can I split an atom at...

stephanie from windsor asks

Why can't spruce trees compete with maple trees in more southern forests? What advantages do the...

henry from Paris asks

I heard that mountain chains (from continental collisions) could (thanks to their weight +...

Veronica Johnny from Port Hardy, BC asks

Where did Albert Einstien live?

H. Basran from the Internet asks

Can any plants regenerate after they are totally dried - I don't mean somatic embryogenesis: can...

Margaret Klima asks

What are the globes which, when you puts your hand close to them, display electrical energy...

Sarah from the Internet asks

Why doesn't pepsin break down gelatin on developed photographic film or does it just take a very...

John Mitrosky from Scarborough asks

My son is doing a herptiles of ontario project and this a missing link question: Do you think...

Alicia asks

What would be the appearance of the moon if it were in the western sky just after sunset? Why would...

Yevgeniy Perev from Staten Island asks

How much energy did the highest energy neutrino detected so far have?

Pat Prokop from Orillia asks

Last year a friend of mine widened and deepened an existing pond on his property. A considerable...

Peter Griffin from Beaufort asks

Do all antibacterial soaps kill bacteria? How do you test if they do?

George Z from the Internet asks

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

Lacci from Withernsea, Yorkshire, England asks

Many people say there are 5 senses in the body but I am arguing with my mum here that there are...

Alyssandra from Oakville, Ontario asks

I was watching a program about sleep-walking and they were saying something about how dreams were...

Lisa Yang asks

How do split ends affect the way your hair grows? Why do people say that when you have split ends,...

anton from Melbourne (Australia) asks

Is blood more complex than just the four groups? How? Also, what structures allow humans to have...

Guy from Vancouver asks

Why did Canada pull out of the ITER fusion project, and what, if any, research is Canada...

Ryan Martinez asks

Why do magnets erase magnetically recorded data? Are there some generally accepted guidelines for...

Boo from Mississauga asks

Why do some people use salt to kill weeds? What does salt do that makes the weeds die?

Josh Blake from Mississauga, Ontario asks

I am really interested in chemistry and I was wondering where I would be able to purchase some of...

Jennifer from Brooklyn asks

Why does uracil replace thymine in RNA?

Rick Anderson asks

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

Nameless from Internet asks

When a baby is formed it starts out as one cell then splits and reproduces and forms perhaps...

David Cheverie asks

How do you know what size lobsters should be released instead of taken, in order to ensure the...

Alexandra asks

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

Mary Phipps asks

Is calcium carbonate (ground limestone) biodegradable? Will it break down during composting? I want...