Convection currents, resulting from uneven heating of the earth's surface, cause wind to form.
 
        
             
        
        
        
Since i live in it: America
IF we go by the British:
first they landed at Roanoke and Jamestown. Jamestown was successful. 
#1 expansion: colonists were given the right to move all the way up to the Appalachian mountains.
#2 expansion: When the US bought the Louisiana purchase
#3 expansion: The successful revolt of the Texans
#4 expansion: Mexico succeeds most of their northern lands.
#5 expansion: Gadsen purchase: brings the US mainland's border too today.
Many difficulties include:
1) no good maps
2) hard to make livings
3) Indians, robbers, etc
4) diseases, exposure, etc
5) ran out of supplies
6) broken down wagons, etc (if they took the boat to California, it will be: traveling for a long time, etc)
7) etc etc
hope this helps
if you need anymore examples, drop a comment below
        
                    
             
        
        
        
Answer:
The middle layer has no fossils. As such, the layer is likely not the same age as the fossils above and below it. The middle layer might represent a rock intrusion that occurred at most 445.6 MYA, based on the age of the trilobite. The middle layer could also be older than Peripatus, at least 570 million years old. The age of the middle layer can’t be stated with any certainty.
Explanation:
This is the correct answer according to PLATO/ edmentum
 
        
             
        
        
        
Answer:
According to a FAO (Food and Agriculture Organization of the United Nations) report, the foreign direct investment in food in countries from Southern America varies from a country to another one. The top countries are:  
- Brazil
- Argentina
- Colombia
- Other Southern America countries where is included also Uruguay.