In this activity, you will visit a site where a natural resource is produced (such as a quarry, farm, or water treatment plant) or where waste is processed (such as a landfill or wastewater treatment plant). You will make field observations and gather information using a digital camera or digital video camera. You will need these materials: digital camera/video camera notepad pen/pencil Stay safe. Stay away from open pits and hazardous areas.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: