These German submarines were used to secretly attack Great Britain during WWI.
What are U boats?
100
These were forced to be built and be made better after the car became a commonly used way of transportation in the US.
What are roads?
100
This farming technique that has both positives and negatives, was used by the Portuguese in Brazil used fire to clear out farm land.
What is slashing and burning?
100
This form of media was used to biasedly express opinions and beliefs especially regarding politics starting in WWI.
What is propaganda?
100
The first mode of aviation invented in the early 20th century by two brothers.
What is the Wright Brother's model b airplane?
200
Germans used this gas against the US and Switzerland during their efforts to take over Norway, France, Denmark, Belgium, and the Netherlands during WWI.
What is mustard gas?
200
This invention was used by the ancient Egyptians to control the Nile River when it flooded.
What are canals?
200
This farming technique was used in the mountains and on slanted pieces of land.
What is step farming?
200
This type of rule was used in places that sent their people to watch the colonies.
What is direct rule?
200
This man owned most of the new railroads that were built all across the US to transport goods and people.
What is Vanderbilt?
300
Developed in 672 B.C.E. this incendiary weapon was used by the Eastern Roman Empire to burn enemy ships.
What is Greek fire?
300
In India this invention was created to help make the cities a little cleaner and help with the spread of disease.
What are sewage systems?
300
This plant was one of the first selectively made grain to be used in China to feed the people.
What is rice?
300
This type of rule over colonies was used when the government of the mother country didn't send an army or anything to look after the people.
What is indirect rule?
300
This product was made in hope that every person could afford one, the man that invented them also made the 8 hour work day.
What is Henry Ford's car?
400
This German gun (cannon) could fire about 75 miles away, was the biggest gun used during WWI but was taken away by the Treaty of Versailles
What is the Paris Gun?
400
Lager building where being built because the US had found a way to use this to make building material that was stronger than wood.
What is steal?
400
This movement started when animals began being used for food and were domesticated.
What is the enclosure movement?
400
A place where farmers of each community would get together to share food and help each other plant and take care of their crops.
What are commons?
400
Created by Thomas Savery and perfected by James Watt during Great Britain's industrial revolution this invention would allow water to be pumped out of coal mines more quickly.
What are steam engines?
500
These 2 weapons, a short spear and arrows that could not be reused by their enemies because the tips broke off upon impact were used during Romans battles.
What is a phalanx and pila?
500
In ancient China bronze was used to make everything. However this other material began being used because it is stronger and more durable.
What is iron?
500
This replaced people's jobs because they were no longer needed to help plant at their neighbors farms.
What is they Jethor Tull (seed drill)?
500
This system of communication was put in place by Genghis Khan in the beginning of the 13th century.
What is the postal relay system?
500
Used by the Chinese during the Xia Dynasty this mode of transportation was used to transport infantry and weaponry across battlefields.