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anygoal [31]
3 years ago
6

Susan Solomon hypothesized that ClO levels would be increased if ozone depletion came about because of CFCs. Her team found elev

ated levels of ClO in support of her hypothesis by measuring the composition of the atmosphere where the ozone hole was found, and also by analyzing light reaching the ground to determine whether it was changing in the region with less ozone and more ClO. Was this an observational or experimental study?
History
1 answer:
Gennadij [26K]3 years ago
6 0

Answer:

It is an observational study

Explanation:

In an observational study, nothing changes, all the researcher has to do is to record findings, it is a study that involves the collection of data in a real-world setting without intentionally manipulating any variable. On the contrary, an experimental study involves the manipulation of variables, you have the control group and the test group, the test group is subjected to the treatment.

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Those who can vote has changed through time. In the 1820s and 1830s states removed the landowner condition for voting. In 1870, black men were given the right to vote under the 15th Amendment. In 1920, women were granted the right to vote under the 19th Amendment. Lastly, the age was moved from 21 to 18 in 1971 with the 26th Amendment. 
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