Question

Measuring body
temperature
-10°C to 110°C
EXERCISE
(c) heat
A Choose the correct option for each of the following.
1.
The form of energy that flows from a hot object to a cold object is called
(a) temperature (b) thermometer
(d) light
2. The degree of hotness or coldness in a substance is called
(a) temperature (b) thermometer
(c) heat
(d) light
3. In solids, transfer of heat can take place by
(a) conduction
(b) convection
(c) both (a) and (b)
(d) none of these
4. The transfer of energy between objects that are in physical contact is by
(a) conduction (b) convection (c) radiation
(d) none
5. Which of these is a conductor of heat?
(a) Wood
(b) Paper
(c) Copper
PSS​

Answer 1

$\LARGE{ \underline{\underline{ \sf{Required \: answer:}}}}$

1. Heat (c)

• It is form of energy which is created by the motion of particles. It is the average kinetic energy.

• The heat flow causes the hotter object to cool down and the colder object to warm up.

2. Temperature (a)

• It is the degree of hotness and coldness of a body. It shows effect for the cause of heat transfer.

• It is measured with a instrument called Thermometer. Temperature can be measured in °C, °F and K.

3. Conduction (a)

• Conduction is the transfer of thermal energy through direct contact. It mostly occurs in solids.

• Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules.

4. Conduction (a)

• Explaination in (ii) above in 3.

• An example of conduction is using a metal rod to roast marshmallows on an open fire and feeling the heat rise through the rod from the fire to your hand.

5. Copper (c)

• It is a metal, and metals are generally good conductors of heat and electricity.

• The thermal conductivity is higher and heat can easily pass through conduction.

Answer 2

Answer:

$\huge \bf \: answer$

1. Heat

• It is the form of energy that flows from a hot object to a cold object .
• Its unit is joule.

2. temperature

• It shows the hottness or coldness of a body.
• It can be measured in celsius or Fahrenheit scale.
• It's unit is Kelvin.

3. Conduction

• In solids, transfer of heat can take place.
• It's unit is simens.

4. Conduction

• It is the transfer of energy between objects that are in physical contact

5. Copper

• Copper is good conductor of heat.
• It is the 29th element of periodic table.
• It is malleable.