Question

1. Which direction will the heat flow while this person holds a hot cup of tea?


(a)From cup to her hand (b)From hand to the cup (c) no heat transfer occurs

2. Which of the following will be the best conductor of heat?

(a) iron (b) glass (c)plastic

3. Air is an example for

(a) conductor (b) insulator (c)none of these

4. The instrument which is used to measure temperature is

(a) Barometer (b) thermometer (c) oximeter

5. Heat is transferred in liquids and gases by

(a) conduction (b) convection (c) radiation

QII. Think about following statements below. State whether each is an example of conduction convection or radiation

1. A central heating radiator warms a room. -----------------------------------

2.The handle of a metal spoon left in hot coffee gets hot. -------------------

3. Heat from the Sun travels to the Earth. ------------------------------​

Answer 1

Answer:

And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation.

Answer 2

Answer:

And unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation.