Question 2

what agent causes sand dunes to form?

ocean waves

weathering of old rocks in the desert

the wind carries the sand until it runs into an obstacle

gravity

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.