It must be, if the nebular hypothesis has any truth, older than our world; and long before this earth ceased to be
molten, life upon its surface must have begun its course.
The fact that it is scarcely one seventh of the volume of
the earth must have accelerated its cooling to the
temperature at which life could begin.
--H. G. Wells, The War of the Worlds, 1898
What makes the tone of the passage formal and scientific?

Read the passage. (1) the first skateboard was constructed of old roller-skate wheels attached to a piece of wood. (2) improvements were made to the skateboard in 1959. (3) the year that the first commercially made skateboard appeared. (4) soon after, skateboarding began to grow in popularity. (5) in 1963, skateboard manufacturers formed the first professional skateboarding team. (6) that same year, the first organized skateboard competition took place, in california. which is the most effective way to correct the fragment in sentence 3? attach the fragment to sentence 4. attach the fragment to sentence 2. insert the phrase in the united states to the end of the fragment. insert the verb had before the verb appeared.

When your appreciate the opinions of other teammates you show

“generally, however, the term robot refers to any machine that is able to perform a complex task on its own, but whose actions or tasks are controlled by human programming.”