UCLIO
Read this quotation from paragraph 2.
"The bones of men and animals that lie bleaching along the trails abundantly testify that this
was not the first instance in which the plain had baffled the determination of man."
The quotation suggests that the selection uses imagery that relates to a time in
American history -
after the invention of the tractor and mechanical harvester
before the invention of trains and automobiles
O before the construction of towns and cities
O after the construction of bridges and fences

elon musk, ceo of spacex, a startup space company is planning to head to mars by 2023. nasa is planning to go to mars at around 2025. both are just for a basic colony.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).