That is true in a way. But then we get knowledge from the elder people who has lived in this world for a very long time, so we should consider that too.
I believe the answer is: <span>Risk exploitation
</span><span>Risk exploitation refers to the process of eliminating uncertainties that might cause a certain damage for us in the future.
This action is being done by analyzing each possible risks and creating specific preparations to tackle those risks in the future.</span>
Quartz is the mineral which is the most resistant to both chemical and physical weathering.
Chemical weathering refers to erosion of rocks due to the influence of chemicals, whereas physical weathering doesn't involve them changing their chemical constitution.
Answer:
They typically last between 30 and 60 minutes, with around 3-10 periods per school day.
