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...

amanda from the Internet asks

How does cold front differ from warm front? How does a slow moving cold fromt differ rom a fast...

DeeCee from Indianapolis asks

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

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?

nijin from Khd asks

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

Pat Prokop from Orillia asks

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

Charles from Vancouver, BC asks

The earth receives energy in the form of radiation from the sun. Some is re-emitted into space and...

Antreas Alvanis from Limassol, Cyprus asks

If global warming exists and a large amount of energy is trapped in earth every day, why do we need...

Lev from Vancouver asks

What would happen if the Earth were to very gradually stop spinning? Would one side become...

trish brooks from Ottawa asks

We used to have a wooden stick on the outside of our house. It measured air pressure or humidity...

Joseph Zaccardi from Grande Prairie, Alberta asks

A couple of years ago news broke about the evidence found for water below the earths surface. I...

Noah from Vancouver asks

I'd like to know if there were cherry trees in the time of the dinosaurs and if so did any...

Anonymous from Montreal asks

Is there a definitive answer as to whether it is harmful for your health to sleep with plants in...