Hi!
You would not want to use a stopper when<span> combining two unknown substances because the gasses made from the combination could end up creating to much pressure and explode.</span>
A i believe hope it helps
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Consumption of a synthetic material being increased, leads to an associated negative impacts to Earth required to produce it is a True statement.
<h3>What is a Synthetic material?</h3>
There are the materials which are made by humans through chemical synthesis which are usually done in factories.
The production of this type of materials leads to the emission of chemicals and other gases which are harmful and negatively impacts the environment.
Read more about Synthetic material here brainly.com/question/24357817
9.there are thermal cups that we use
