What do you understand by:

melting point of ice, and boiling point of water.

What do you understand by:

$0^0$ and ${100}^0$ on a thermometer?

In which direction the heat energy will flow when: Your hand is warm and the surface you are touching is cold.

In which direction the heat energy will flow when:

a glass of milk you are holding is hot.

In which direction the heat energy will flow when:

Water in a bowl gets heated when a glass of hot milk is placed in it.

How and why does this happen:

Bulb of a Doctor’s thermometer breaks when placed in hot water.

How and why does this happen:

Tea remains hot in a thermos flask.

How and why does this happen:

Heat from a room heater does not reach you when an opaque object is placed in between.

Explain, giving reasons:

Mud houses with thatched roof are warm during winter and cool during summer.