Thermometers and Heat transfer

Question 1

What is a clinical thermometer?

Answer 1

A clinical thermometer is used to measure body temperature.

Question 2

What is the range of a clinical thermometer?

Answer 2

The range of the clinical thermometer is between 35 and 42 degrees
celcius.

Question 3

How many methods of heat transfer are there?

Answer 3

There are 3 methods of heat transfer.

Question 4

What is used to measure temperature?

Answer 4

A thermometer is used to measure temperature.

Question 5

——————— takes place in a solid without any visible movements of particles.

Answer 5

conduction

Question 6

—————- freezes at 0 degrees Celsius and ————- at 100 degrees
Celsius.

Answer 6

Water, Boils

Question 7

Which thermometer is most sensitive to temperature?

Answer 7

Mercury thermometers are most sensitive to temperature change.

Question 8

—————- takes place in a liquid.

Answer 8

convection

Question 9

Warm air rises and cold water sinks because of-

Answer 9

convection

Question 10

How do plants affect the carbon dioxide in the atmosphere?

Answer 10

Plants take the carbon and make them into sugars which used to store energy to help build tissues and grow.

Question 11

What do cfc’s do?

Answer 11

cfcs destroy the ozone layer.

Question 12

What does the newton disc demonstrate?

Answer 12

The newton disc demonstrates how colours combine to form a white light.

Question 13

Where does regular reflection takes place?

Answer 13

It takes place on a smooth flat surface.

Question 14

What S.I unit is used to measure temperature?

Answer 14

Kelvin is used to measure temperature.

Question 15

—————- takes place at any temperature whereas ————— takes place at a specific temperature.

Answer 15

Evaporation and Boiling

Question 16

What is heat?

Answer 16

Heat is a form of energy that is transferred from a region of high temperature to one of lower temperature.

Question 17

What is Radiation?

Answer 17

Radiation is heat from the sun reaches us by radiation in the form of electromagnetic waves.

Question 18

What is a vacuum flask or thermos?

Answer 18

A vacuum or thermos flask keeps things close to their original temperature by reducing the transfer of heat between the flask and its surroundings.

Question 19

What is the difference between a green house and glass house?

Answer 19

A glass house is made out of glass in which plants are grown more faster than outside by trapping heat inside the glass. Whereas, it is a building that is used to grow plants by trapping heat even with different seasons or climates.

Question 20

Advantages and disadvantages of using alcohol in a thermometer.

Answer 20

Advantages: lower freezing point, larger coefficient of expansion and less hazardous.
Disadvantages: less durable and lower boiling point.

Question 21

Advantages and disadvantages of using mercury in a thermometer

Answer 21

Advantages: heap, durable, accurate and easily calibrated.
Disadvantages: display is harder to read, does not work below -39 degrees Celsius , slow response, fragile and mercury vapour is poisonous.