(Q).
Answer the following question given this paragraph: In a procedure called elemental analysis , an unknown compound can be analyzed in the laboratory in order to determine the percentages of each element contained within it. These percentages can be transformed into the mole ratio of the elements, which leads to the empirical formula. The steps to be taken are outlined below. Q: What is the name of the procedure where an unknown compound can be analyzed in the laboratory in order to determine the percentages of each element contained within it? Choices: - electrical analysis - chemical analysis - gaseous analysis - elemental analysis A:
(A).
elemental analysis

(Q).
Answer the following question given this paragraph: Like density, the pressure of the air decreases with altitude. There is less air pressing down from above the higher up you go. Look at the bottle pictured below ( Figure below ). It was drained by a hiker at the top of a mountain. Then the hiker screwed the cap on the bottle and carried it down to sea level. At the lower altitude, air pressure crushed it. Can you explain why?. Q: How does air pressure change as altitude increases? Choices: - goes up and down - stays the same - It increases - it decreases A:
(A).
it decreases

(Q).
Answer the following question given this paragraph: Segmentation evolved next. Segmentation is the division of the body into multiple parts, or segments. Both the earthworm (Phylum Annelida) in Figure below and ant (Phylum Arthropoda) in Figure below have segmented bodies. The earthworm has many small segments. The ant has three larger segments. Segmentation increases an animal's flexibility. It allows a wider range of motion. Different segments can also be specialized for different functions. All modern annelids and arthropods are segmented. Q: Earthworms and ants possess what type of bodies, which means division into multiple parts? Choices: - elongated - truncated - elliptical - segmented A:
(A).
segmented