Sherri from Baltimore asks

Does Henna (a plant based hair dye) contain any aluminum in its substances?

Jessia from Ontario asks

How high in the sky would Polaris the North Star be, as seen from the North Pole?

Tony Kirk asks

Would sulfuric acid have a long term effect on an engine and eternal parts of an car if a bottle...

Holly asks

What is the difference between a dolphin and a porpoise?

The Tucker Family from Hamilton asks

How many people have ever lived on earth? We have found data giving the population at differen...

Sharon Johnson from Tobermory asks

Can decomposing cedar wood chips or household compost cause environmental problems in surrounding...

Michel Lamontagne from Edmonton asks

Why does sound get through a surface like a wall better than light? If you use a curtain they both...

James from Hamilton asks

If 'O' (oxygen) is an element and CO2 is a compund...what is O2, or Cl2?

Kim Monin from Nepean, Ontario asks

I am trying to make natural beeswax into an ivory colour. Some people say they use natural dyes. ...

Richard Hart from Victoria, BC, Canada asks

My wife asked me, "What does the sun burn and why doesn't it burn out?" I told her about helium...

Base from Ontario asks

Why is vegetable oil viscous?

Wayne Boutzale asks

What are giant ice meteorites? Would it be possible for them to hit the earth?

Loubelle I. Depita from Koronadal City, South Cotabato, Philippines asks

Why is sterilizing & using alcohol effective against microorganism?

Matt from Pickering asks

How are genes located? For instance, Lap-Chee Tsui and his team of geneticists located the...

Kiana Stewart from Blacksburg asks

If Virginia sees a full moon in the daytime then do places like Australia see no moon at night?

Cristina asks

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

Asli Tamer asks

How do bacteria use rhodopsin to create energy?

Tom Henson from Bettendorf, Iowa asks

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

Denise Atkins asks

What causes asteroids to burn up once they enter earth's atmosphere?

Ric Martin from Houston B.C. Canada asks

Can someone tell me what Canadian frogs and toads are vocal? We have several types here, but they...

Shagufta asks

What are cosmic rays?

özgür o?uz from Yata?an/Mu?la asks

How can an ant hold up a weight which is 50 times more heavy than ant's own weight?

deepak singhal from Bangalore (India) asks

Before getting married should we consider blood groups of both individuals? Is there any...

Tsiadimos Nick from Athens, Greece asks

If we put a current-carrying conductor inside a magnetic field (i.e. between two permanent...

Saurabh from New Delhi asks

Gravity can produce motion in a body. Thus, it does work. But, for doing work, energy is needed....

Sue from Mississauga,On. Canada asks

What is the chemical composition of soya margarine?

Bonita asks

I lost my sense of smell after a fall from a horse 5 years ago. The back of my head hit the...

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...

samantha from Sarnia asks

Is it true that only female bees can sting you? And if it is, why is that?

Mauro Mavrinac from Ottawa asks

Given: a horizontal rigid tube with one end on an axis at a constant rotation. Insert a solid ball...

John Douglass asks

Hexane seeps out of the ground at old sites of underground gasoline storage tanks. Can I smell...

Avishan from the Internet asks

Why is the strawberry in yogurt flavored strawberry sometimes brown or reddish brown? Is it a...

Edward from Mississauga, ON asks

I have a wierd thinking question regarding electricity. When we have a positive charge or a...

John Wood from Binmaley, Philippines asks

Why do (nearly) all birds move in a jerking motion as compared with other animals that move...

Gary Kolling asks

What term is applied to all processes and physical measurements carried out under conditions of...

Abhinav from Delhi asks

Why do all planets revolve in elliptical orbits around the sun? I mean in nature there existis...

Cynthia Everhart from Leesburg asks

My neice is being tested for an unknown cause to her developemental delay. She has recently been...

Sara asks

If the first dimension is length, the second is width, and the third is depth/height, what's the...

Amelia Singh from scarborough asks

How are rocks made? What are the different kinds of rocks?

Michel asks

If Humans and Apes are related, why aren't we able to reproduce together?