Important Questions Test: Heat - Class 7 MCQ

To measure temperature of human body we use clinical thermometer or doctor's thermometer.

Aluminum is a good conductor of heat. Aluminum has a high thermal conductivity. Wood is a poor conductor of heat (as well as other forms of energy) because it is covalently bound as a compound.          

Cold air moves from land towards sea during night: Land breeze occurs at night when the land cools down faster than the sea. As a result, the air above the land becomes cooler and denser, creating high pressure. The cooler air moves towards the warmer sea, creating a breeze that blows from the land towards the sea. This phenomenon is known as a land breeze.

At night, the land cools down faster than the water. The cooler air over the land moves towards the sea, which is called the land breeze.

- Seema should put her noodles on a metal plate to cool them down faster.
- Metal is an excellent conductor of heat. It quickly transfers heat away from the noodles to the surrounding environment.
- Other materials like wood, paper, and plastic are poor conductors. They insulate and retain heat, causing the noodles to cool down more slowly.

The normal temperature of the human body is 37° C.

Conduction is the process by which heat is transferred from the hotter end to the colder end of an object, and in solids, the heat is generally transferred by conduction.

 Cool air from the sea moving towards the land is called Sea Breeze. The cooler air from the sea rushes in towards the land to take its place.

Radiation does not require a medium for the transfer of heat; it can occur through a vacuum, as in the transfer of heat from the sun to the Earth.

Multiple layers of clothing trap air between them, and since air is a poor conductor of heat, it acts as an insulator, keeping the body warmer.