You are in the lab and notice another student applying cosmetics, why is this dangerous and not allowed in a lab? cosmetics can pick up gases in the lab and those can infect the eyes and mouth. cosmetics contain harmful substances and can contaminate the experiment cosmetics are tested before they are put on the market so they should not harm the person. as long as the student is wearing gloves there is no harm in applying cosmetics in the lab.

Cosmetics can pick up gases in the lab and those can infect the eyes and mouth.

Explanation:

A biology or chemical lab involves the use of chemicals which can be used to conduct the experiment. These chemicals are harmful if inhaled, touch with skin and can burn the cloths.  Thus appropriate measures should be taken to prevent harm.

Cosmetics are products that consists of the chemical substances which are used for the purpose of make up, moisturizing and beautify the skin. The chemicals present in the cosmetics can react with the gases in the experiment, thus may cause burn and injury to the student.

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a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]