Pruitt lives in a city that is typically dominated by a maritime tropical air mass. after listening to the weather update, he learns that a maritime polar air mass is approaching his city. which statement explains this movement of air? air masses move from west to east in the northern hemisphere. air masses move from colder areas to warmer areas. air masses move from high-pressure areas to low-pressure areas. two air masses merge into one and share the properties of both original air masses.

Air masses move from high-pressure areas to low-pressure areas.

Explanation:

Pruitt’s city must be located more or less within the equator for it to be dominated by maritime tropical air mass. This region receives ample sunlight throughout the year due to the relative positon of the sun. Its atmosphere is therefore generally highly heated than that of the polar regions. The air in the tropics region becomes less dense and rises into upper atmosphere. The denser and cooler maritime polar air mass from the poles moves in to replace the rising air in the tropics hence creating incoming cooler winds. This is how trade winds are created across the globe distributing energy around the world to a more or less homeostatic level.

from almost the creation of the first true maps of the earth, people started seeing how continents would be able to fit together.   in particular, people noticed that south america fits almost exactly into africa.

you should be aware that while world maps were around early in the 1600’s and better defined by the end of the 1700’s, those maps were not ‘public’ but were treated as state secrets.   and so it was not till much later that the broader ‘science’ community had access to good quality and accurate world maps.

get the whole story here…

it is now known that most of the major continental masses can be fit together in a jigsaw process.   in fact we now know that the continents were indeed once all joined together as one land mass – the supercontinent of pangaea.

if you look at most world maps you will ponder how this is evidence, as the continents really don’t appear to ‘fit’ together very well.   what you need to understand is that the vast majority of maps are drawn using a map projection that has the north and south poles (which are points) are a line the width of the map at the top and bottom.   this means that the map distorts the true shape of the earth’s land and oceans as you love closer to the poles.     some other map projections distort less, but have the map shape looking like segments of an orange.   see here for a range of map projections.   check out the way greenland changes size in each!

what is more remarkable, is the next piece of evidence when added to the shape of continents.

location of mountains and fossils

what is remarkable, when you reassemble all the continents together, the ancient mountain ranges (many now eroded to their cores) and the location of rock types and fossils all match up.

organisms that are both used in toothpaste as well as cause malaria are protista and monera.