Jennifer Joseph from Dix Hills, NY asks

Animals eat leaves and grasses and this provides them nutrition. Can people take leaves off trees,...

RR from Toronto asks

How do electric kettles work?

Roman Tanisis from Coquitlam, BC asks

Hi was always wondering if it is ok to use a higher voltage power supply for a lower voltage...

Pablo Ros asks

I have been charging a leyden jar with an electrophorous (pieplate and cup) and was wondering how...

Linda Sanders from Catonsville MD asks

Why does my coffee flow more freely from a to-go cup when there are two holes in the lid instead of...

Sarah from Northampton England asks

How do you measure the pH of soil? How do you make up a solution of different pHs? What is the best...

Clare Reading from Mesa asks

What is the pH of Diet Pepsi? (or cola,generally) and... Does smoking affect the body's pH? If so,...

Sarah Spratt asks

What is the most critical environmental problem in Canada today?

Karen from Ottawa, Canada asks

Why do your fingernails grow a lot faster than your toenails?

Danielle Panchuk from Calgary asks

Why after drinking massive amounts of alcohol, which is a liquid, do you wake up dehydrated the...

Peter Griffin from Beaufort, SC asks

Are all non-toxic claiming products really non-toxic? And is there any simple way (such as a way...

Alvina Chung from Sydney asks

The first four facts below suggest that the earth should be getting heavier and heavier - but it...

Phil asks

What are the chemical properties of phosphorus?

Nijin from khd asks

I read in books that bees cannot identify the colour white. Then what will the bees see instead of...

Liz Morice asks

What makes the aluminum powder in an Etch-A-Sketch stick to the glass to make an image?

Arnold J. Wallmann asks

What causes albino-ism in people? Which chromosome is the albino gene on?

Adil asks

Has absolute zero (0 K) ever been reached a laboratory?

Gina from Boston, Massachusetts asks

I am allergic to nickel and cobalt. (thanks to patch testing). I think it was provoked by taking...

Dave from Sutton asks

Are there foods to eat which lower/reduce harmful cholesterol levels, or is this achieved by...

Furqan from Lahore asks

Why don't ordinary Silicon diodes emit light like LED's?

Sarah Bosquet from Issoudun asks

I'm writing a science-fiction novel and need information about black holes, gravitation and...

Kirandeep from Ludhiana asks

Why do proteins form lather on making their solutions?

Holly asks

What is the difference between a dolphin and a porpoise?

KIm from Waldorf asks

What furnishs H30+ in water solution?

Thomas Seltsam from Austria asks

Is glass an amorphous mass? Old glass, for example the glass found in old churches, is much thicker...

shane from doylestown asks

How do scientists type your blood? How do they find out your blood type?

Dr. X from Cornberry asks

I have made a theoretical discovery in my studies. It concerns vibrations of frame of reference in...

Daniel Eyre asks

How far is Pluto from the sun, and will we ever be able to travel to other planets, besides the...

Sonia asks

How could I decrease the boiling point of a substance without changing the pressure of the liquid?

David Magill from Shippensburg asks

In 1828, Friedrich Wohler, a German chemist attempted to make an inorganic salt, ammonium cyanate,...

John Jones asks

Why has our departmental tarantula, who lives in my office, retreated into a cardboard tube and...

Dawn from Santa Clarita asks

Is a seed a living thing? If so, how do you prove it? Is it living before you add water?

Cristina asks

How far is the Sun from Pluto? How long does it take for sunlight to travel to Pluto?

missy cunningham from portsmouth asks

Every time we go to our local grocery store and get a buggy that does not have a chain hanging from...

Tom Henson from Bettendorf, Iowa asks

I am doing a science project on how light affects plant growth. If you could answer my 10...

Zambi Donburi from Brisbane, Australia asks

Is it true that no mass can travel at the speed of light? If this is true, as you are nearing the...

Michelle from San Jose asks

What are vinyl erasers made of?

aparna from Petaluma asks

Why is blood salty?

Leah W. from Duluth asks

What is the smallest living thing? What is the largest living thing?

erin asks

Can you explain how those bright sticks work, the ones that glow for hours with a snap and a shake?