Exercise 4 depositional environments 49 part b blackhawk formation, cretaceous, price canyon, utah (figure 4.8) 1. what is the dominant sedimentary rock type shown in figure 4.8 2. what economically important sedimentary rock occurs in this outcrop? 3. rocks of the blackhawk were most likely depos- ited in which of the sedimentary environments listed in table 4.1? explain your answer.

if you mean hydrogen and oxygen then water is the product

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.