Answer:
Standardization sample
Explanation:
Standardization sample is a group of individuals which is pretested of a given scenario or exposure prior to start of any research or study so that at the later stage of the research or study, the results obtained by exposing new sample to the same scenario or exposure can be compared with the results obtained for standardized sample.
<span>Copernicus placed the sun at the center of the universe. Ptolemy place the earth at the center.
Both of these view couldn't be proven at that time, but only Copernicus experienced negative backlash by the church because it's deviate from the biblical teaching. Not until year of 1600s before another intellects name Galileo created the invetions that might prove Copernicus' theory (which also being torn apart by Religious groups)</span>
These lines are called cross-contour lines.
Cross-contour lines are used in making nice pieces of art but most importantly they are a huge helping tool. These cross-contour lines can help people understand the solid form and the appearance of object from different perspectives and vantage points. Thus they are invaluable learning tool.
