Which of the following statements is true? organic sedimentary rocks are made of mineral crystals. all sedimentary rocks contain weathered rock and sediment. stalagmites and stalactites are examples of chemical sedimentary rock. peat and coal are examples of clastic sedimentary rock.

Seed plants that lived during the carboniferous impact life on earth today because a. they are the ancestors of all plant life on earth. b. their remains formed coal, which is an important resource. c. they produced fossils that are used to date many geologic events. d. their presence caused oxygen levels to drop, allowing animals to evolve.

Which statements are accurate about snow flakes

In the diagram below dab and dac are adjacent angles