To answer question
1)what countries does the usa border on?
2)what mountains chains in the usa do you know?
3)where are the great lakes situated?
4)what is the largest river in the country?
5)does the colorado flow north or south?
6)what is death valley famous for?
7)why do so many people want to see the grand canyon?
8)what is the name of the famous waterfall in the usa?
9)where ate the great plains situated?
10)can you name two places os interest in washington?
11)who were the first people to live on the continent os australia?
12)when did people from europe begin to arrive in australia?

1.Canada  and Mexico 
2.The Rocky Mountains and The Great Smokey Mountains
3.The lakes are on the U.S./Canadian border, touching Ontario in Canada and Michigan, Wisconsin, Minnesota, Illinois, Indiana, Ohio, Pennsylvania, and New York in the U.S.
4. The Mississippi River
5. The Colorado River flows south
6. Death Valley is famous for : North America's driest and hottest spot and has the lowest elevation on the continent.
7.The Grand Canyon is one of the seven natural wonders of the world.
8.Niagara Falls
9.It goes through the center of : North Dakota,South Dakota, Nebraska, Kansas,Oklahoma, and Texas.
10.If you mean Washington then its Seattle Art Museum and he Burke Museum of Natural History and Culture,but if you mean Washington D.C its The White House and Smithsonian Museum .
11.a band of Southeast Asians 
12.In the year of 1788