An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not. Why ?

Q. An ordinary glass bottle cracks when boiling water is poured into it, but a borosilicate glass bottle does not.

Q. Give scientific reasons.

(a) An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not.
(b) The telephone wires which sag in summer become straight in winter.
(c) Dew drops form on the grass in winter.
(d) In winter, why does an iron pillar feel colder than a wooden pole ?

Q. A thick glass tumbler often cracks when boiling water is poured into it. Why?

Q. A thick glass tumbler cracks when boiling hot water is poured in it.