If they possessed the requisite knowledge they would rationalise what they had observed and realise that the composition of an atmosphere is of utmost importance in determining the climate of a planet. They would expect extreme weather conditions consequent to the atmospheric composition, gravitational factors, proximity to the Sun etc.

The three planets Venus, Earth and Mars have radically different and largely incomparable atmospheres. Venus has an extremely dense atmosphere consisting mostly of carbon dioxide and this has caused a runaway greenhouse effect, Earth has a benign atmosphere that moderates our climate and supports life, Mars has almost no atmosphere at all.

If you want extreme weather than you need to go further out from the Sun. Some of the outer planets have storms that last for decades with wind speeds in excess of 1,000 miles per hour. There are places where it rains liquefied methane and carbon dioxide in huge droplets that gently float to the ground. There are atmospheres so toxic that humans would die in seconds if they inhaled them and boiling lakes of liquid methane.

What purpose does that serve?

Are you just trying to make comparisons or are you trying to behold meaning in your paragraphs?

You do realise people have no control over the weather, complaining is a by-product I suppose, nobody has to take a trip to Mars or Venus and if they did I doubt they'd not expect - being qualified astronauts or cosmonauts - the actual temperature of the planet and that of deep space.

We all like to grumble about the weather, its part of human nature never to be satisfied. Rarely is it just right. Its always too hot or too cold. A sample of Venus and Mars weather would give us something to really moan about, but as its unlikely to happen, do belt up about it, and be very grateful if you escaped the last tsunami.

All you need on Mars is long johns and some oxygen (well at the equator anyways). On Venus, you'd need a diving bell.

However, don't ever go to a brown dwarf. You want extreme weather? http://www.space.com/2576-wild-weather-i...

We do not live on Venus or Mars so why even ask this question?

Well it is all conjecture of course, but my guess is that the since atmosphere of those two planets are mostly CO2 they could reasonably think that CO2 is not as good for plants as deniers claim it is.

And yet another useless post

Do your schoolwork Middle school must be tough for you Some courses require you to know facts. don't they??