Heat (Practice Sheet,Class 7)

(1) Find out conductors and insulators from the given objects:

Steel spoon, iron nail, wooden rod, plastic scale, brass scissors

Solution-

(2) Name the following:

(i) It is a mode of transferring heat through liquid by molecular motion. ………..

(ii) No medium is required for transfer of heat in this process. ………..

(iii) The maximum and minimum temperatures of the previous day are measured by it. …………..

(iv)Human temperature can be measured by it………….

Solution-

(3) Write precautions to handle the clinical thermometer.

Solution-

(4) Define land breeze.

Solution-

(5)The windows of the houses of in coastal areas are made to face to sea. Give reason.

Solution-

(6)Fill in the blanks:

(i)….. is the lowest body temperature for humans.

(ii)No ………. is required in transferring heat in radiation.

(iii)Wood is a good …………of heat.

(iv)…………….thermometer does not has mercury.

Solution-

(7)Identify the pictures given below:

(a)

schoolhelpbygunjan.wordpress.com | Heat | Picture of thermometer| NCERT| class 7

(b)

Heat, diagram of digital thermometer,NCERT, class 7

Solution-

(8)Define heat and write names of different ways in which heat can flow from one object to another.

Solution-

(9)What is temperature? Name the instrument with which we can measure the temperature.

Solution-

(10)Identify the pictures showing different mode of transferring heat.

(a)

conduction

(b)

convection

(c)

Radiation

Solution-

 

Helping Topics

Heat

NCERT solutions, class 7