Are all the planets in a row around the sun?

When will they make a base on mars?

How much time does it take to put satellites around mars?

Which is the tallest mountain in the solar system?

Which is the tallest mountain in the solar system?

What's the difference between a diamond and a crystal?

Can you find coal underground?

Can you find coal underground?

Can a diamond melt and re-freeze?

Can a diamond melt and re-freeze into another shape?

Can a diamond melt?

Can a diamond melt?

It's the blade of an axe made the same way as a sword?

Is the blade of an axe made the same way as the blade of a sword?

I want to go to outer space camp

Ok so here's what I want for my 8th birthday...
I want to go to outer space camp.

It's there another unit longer than a mile?

Is there another unit longer than a mile?