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Kim from the Internet asks

When metal scrapes metal such as two spoons, it makes the edges of my teeth feel numb. Why is that?

Michael Chen from Calgary asks

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

mark irvine from sacramento asks

If you have a square 1 pound block with a front flat surface strike a ball, would it be the same as...

MacArthur Kaleel from Atlanta, Georgia asks

We all know that earthquakes are one of the primary causes of mountain formation. Does the...

Davina asks

Do people's teeth fall out naturally from old age or is that caused by a disease?

Denise from San Jose asks

Is it possible to do a blood test (or some other type of tissue testing) to determine someone's...

Gavin Dune from Australia asks

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

Ken Marshall from Sault Ste Marie asks

Since trees hold CO2 and produce oxygen, why would it not be beneficial to have marginal farmland...

Jonathan Holt asks

Why is oxygen used in the brewing industries' fermentation tanks? What types of yeast or bacteria...

Jonathan asks

Would you be able to help me out in any way to find material on Fluorine?

Elizabeth Inch asks

Could Dr. Michael Smith's discovery of site-directed mutagenesis be of benefit specifically to...

Nick from Toronto asks

Is it humanly possible to `whistle' or make a sound at a high frequency (similar to a dog whistle)...

Dennis Nolivos asks

What is your opinion on the ethics of transplant farming and what is your opinion about genetic...

Gareth Cook from St. John's, Newfoundland asks

If, as we know, Carbon dioxide - a potent greenhouse gas - is heavier than air,  why is it a...

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...

Brandten B Miller from the Internet asks

How does the shape of the fuselage affect the glide distance of an aircraft? What is the best...

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...

Laura from Toronto asks

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

Keira Sword asks

Can you please explain to me how yogurt is made? My mom says it is made with bacteria, but I am not...

Awot Negash from Alexandria, VA, USA asks

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

DeeCee from Indianapolis asks

Is there a standard formula that will convert altitude into pressure? I'm interested in altitude...

Alicia asks

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

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...

Morgan from Ajax asks

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

Courtney from Jacksonville, NC asks

Mt.Everest has two peaks, correct? What is the height of Mt.Everest' second peak?

Rose Durose from Maple Ridge asks

I'm wondering if you could name some pros and cons of the environmental profession and what kind of...

anton from Melbourne (Australia) asks

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

Sara from Antigonish, Nova Scotia asks

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

Alyssandra from Oakville, Ontario asks

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

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...

Ryan Martinez asks

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

Peter Griffin from Beaufort asks

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

Margaret Klima asks

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

Veronica Johnny from Port Hardy, BC asks

Where did Albert Einstien live?

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...

Jennifer from Brooklyn asks

Why does uracil replace thymine in RNA?

Pat Prokop from Orillia asks

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

Boo from Mississauga asks

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

henry from Paris asks

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