Answer:
Individuals with access to water with no fluoride added.
Explanation:
When we want to do an experiment we must establish which will be the experimental group (one where the factor tested in the experiment is applied) and a control group (one that was set exactly the same as the experimental group but the factor tested in the experiment was not applied). In the case shown in the question above, the student wants to develop an experiment that tests whether fluoridated water is effective in preventing tooth decay.
This student's experimental group is a group of people who consume water with the addition of fluor (factor tested in the experiment) in their composition, whereas their control group will be a group of people who do not consume water with the addition of fluor in their composition.
Explanation:
Global warming is a term almost everyone is familiar with. But, its meaning is still not clear to most of us. So, Global warming refers to the gradual rise in the overall temperature of the atmosphere of the Earth. There are various activities taking place which have been increasing the temperature gradually. Global warming is melting our ice glaciers rapidly. This is extremely harmful to the earth as well as humans. It is quite challenging to control global warming; however, it is not unmanageable. The first step in solving any problem is identifying the cause of the problem. Therefore, we need to first understand the causes of global warming that will help us proceed further in solving it. In this essay on Global Warming, we will see the causes and solutions of Global Warming.
Causes of Global Warming :
Global warming has become a grave problem which needs undivided attention. It is not happening because of a single cause but several causes. These causes are both natural as well as manmade. The natural causes include the release of greenhouses gases which are not able to escape from earth, causing the temperature to increase.
Further, volcanic eruptions are also responsible for global warming. That is to say, these eruptions release tons of carbon dioxide which contributes to global warming. Similarly, methane is also one big issue responsible for global warming.
Answer:
Headaches.
Additional Information:
They are commonly refffered to as 'Caffiene Withdrawal Headaches'.
Odors are the least serious sensory and perceptual disorders
Answer:
Gloves
Explanation:
A person without gloves can pass germs to during the injection causing infection
