Scientific questions have certain qualities in common. Choose the descriptions that apply to all scientific questions. Check all that apply.
They may generate a testable hypothesis.
They must be very complicated.
They are formed only by scientists with proper training.
They have a narrow focus.
They address a gap in knowledge.

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

In the diagram below dab and dac are adjacent angles

Which event had the greatest impact on culture of south america