What precautions will you take while measuring temperature with a laboratory thermometer? What extra precaution will you take while measuring body temperature with a clinical thermometer?

You are planning to go to a very cold place where the night temperature drops to $-50 °\mathrm{C}$. Which thermometer will you take with you − mercury or alcohol? Why?

Can a clinical thermometer be used to measure the temperature of boiling water? Why?

Why is a laboratory thermometer not used to measure body temperature?

You have seen that an ordinary glass tumbler can crack if very hot or very cold water is poured into it. You have two glass tumblers made of ordinary glass−one with thick walls and the other with very thin walls. Which one is more likely to crack when very hot or very cold water is poured into them?