The human body contains many elements from the periodic table. It is mostly composed of oxygen and carbon, but trace elements also have a signicant role. The table gives the mass, in kilograms, of some elements found in the human body, based on a 70.0 kg person. Atomic number Element Mass (kg) 8 oxygen 45,2 6 carbon 12.6 1 hydrogen 7.0 7 nitrogen 2.2 20 calcium 1.3 15 phosphorus 0.78 19 potassium 0.25 16 sulfur 0.18 others 0.60 total 70.0 Potassium makes up what fraction of the mass of the human body? Give your answer in decimal form. Question 18 of 27 > total 700 Potassium makes up what fraction of the mass of the human body? Give your answer in decimal form. Potassium makes up what percentage of the mass of the human body? What is the mass of phosphorus in a 63 kg person? Question 19 of 27 > Graphs are a common data analysis tool used in all branches of science. The given graph represents how light absorbance at 423 nm varies with concentration of an organic dye. Identify the parts of the graph. Answer Bank Dye Cone. (nM) 0 1 23.3 ...... 4. ..... 5. ..... 6 ....37 8 910 Question 19 of 27 Answer Bank Dye Conc. (nM) y = 0.210x - 0.032 .. . . ... .......... Title .... ....' Abs423 ". . . . . .. . .............. ....... :... . . .. ....'; line equation best-fit line 0 1 2 3 4 5 6 7 8 9 10 What is the dependent variable in the experiment? O dye concentration O absorbance at 423 nm O cannot determine based on the information givenQuestion 20 of 27 > Study the given data and graph, and then identify the best label for each axis. Diameter (cm) Circumference (cm) 3 .5 1 1 4.5 14 5.4 17 7.0 22 8.0 25 9.3 29 The xaxis should be labeled The yaxis should be labeled 0 Circumference (cm) O Radius (cm) 0 Diameter (cm) 0 Pi 0 Pi 0 Diameter (cm) 0 Radius (cm) 0 Circumference (cm) Question 21 of 27 The progress of a person on a long hike is shown in the graph. 7 - Distance traveled (miles) B C W A 8 Time (hours) Between which points was the hiker moving? Between which points was the hiker stationary? A and B C and D B and C A and B C and D B and CQuestion 22 of 27 > Evaluate the graph and classify the statements as true or false. True False Cogs ' Line 2 shows that cogs are inversely proportional to Widgets, ] Line 1 shows that cogs are directly proportional to widgets. _ Wldgets ' Line 1 shows that cogs are inversely proportional to Widgets, J ' Line 2 shows that cogs are directly proportional to widgets