A scientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas. Which group of statements best describe all of the materials he is using in the investigation?
They are each compounds. Each of the compounds is made of atoms. All of the atoms are made of matter.
They are each made of matter. Some are compounds and some are elements. They all contain atoms.
They are all elements. Some contain molecules of the same type of atom. Some contain different types of atoms.
O They are each made of matter. Some are compounds made of one type of element. Some are pure atoms.

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Scientific method and data analysisa biology student wanted to determine if there is a relationship between resting heart rate and bodyheight. she gathered information from 12 classmates and constructed the table below.resting heart rate (beats per minute)student height (cm)155. 156156165180180190194195

The accompanying figure shows the percent of selected dna sequences that match between a chimpanzee and other primates. these data support the hypothesis that the figure shows the percentage of selected d n a sequences that match between the chimpanzee and other primates. the human has an almost 98 percent match, the gorilla has an almost 97 percent match, the orangutan has a 96 percent match, the gibbon has an almost 95 percent match, and the old world monkey has an almost 92 percent match. the accompanying figure shows the percent of selected dna sequences that match between a chimpanzee and other primates. these data support the hypothesis that the figure shows the percentage of selected d n a sequences that match between the chimpanzee and other primates. the human has an almost 98 percent match, the gorilla has an almost 97 percent match, the orangutan has a 96 percent match, the gibbon has an almost 95 percent match, and the old world monkey has an almost 92 percent match. chimpanzees and gibbons are the most closely related the chimpanzee's closest surviving relative is humans orangutans are the primates least closely related to chimpanzees old world monkeys and gibbons are the most closely related