Earth can be considered as a closed system, since it only receives sunlight (energy), while the overall mass stays constant, without (almost) any exchange from space. Another example of a closed system is a saucepan or frying pan, on a stove, when its lid is closed.
A. They were trying to find a trade route to make trading easier, so they explored a whole lot more.
B. The Colombian Exchange contributed to the rise of slave trade because when they picked up goods, they just piled 100 or so slaves in the bottom deck. Once a few people had some, many others began to want them and supply and demand skyrocketed. It was easy because the slaves had a different skin color and spoke a different language. The Europeans did not see them as people.
1. Italy
2. Castelli
3. Napoleon
I hope this helped!
The answer to the question above is letter D. 25 pounds is the closest sugar average yearly consumption per person in the United States. American ate 123 pound of sugar per year in 1970, Today the average consumption is 152 pounds of sugar in one year.
