CH-4 HEAT

The Fahrenheit scale ranges from

• 92 degree to 108 degree

• 94 degree to 106 degree

• 94 ml to 108 degree

• 94 degree to 108 degree

X and Y measured their body temperature. X found its to be 98.6 °F and Y recorded 37 °C. Which of the following statement is true?

• X has a higher body temperature than Y.

• X has a lower body temperature than Y.

• Both have normal body temperature.

• Both are suffering from fever.

In Which Of The Statement Is Or Incorrect?

• A clinical thermometer consists a non-uniform glass tube.

• Thermometric liquids can be seen in clinical thermometer.

• The temperature of every person may not be 37 degree Celsius.

• All the above

Which one of the following is a reliable measure?

• Hotness

• Coldness

• Temperature

• None of these

Transfer of heat within water is by

• conduction

• convection

• radiation

• no heat transfer

(a) both assertion and reason are true and reason is the correct explanation of the assertion.

(b) both assertion and reason are true but reason is not correct explanation of the assertion.

(c) assertion is true, but reason is false.

(d) both assertion and reason are false.

Assertion: Sea breeze blows during the day time at seashore.

Reason: The air above the land is hotter and rises up and cold air from the sea moves towards the land beach

• a

• b

• c

• d

Seema is in hurry and wants her noodles to cool down faster. She should put it on a plate made of

• Plastic

• Paper

• Metal

• Wood

The heat from a hot burner to a pot is transferred by ______.

• convection

• radiation and conduction

• conduction

• conduction and convection

On a hot summer day, which shirt would you put on to make sure you stay cool while you are outside playing?

• A black shirt because it reflects the sun's energy.

• A white shirt because it reflects the sun's energy.

• A black shirt because it absorbs the sun's energy.

• A white shirt because it absorbs the sun's energy.

How are heat from the sun and heat from a campfire alike?

• They move by the use of solar energy.

• They move by convection.

• The move by insulation.

• The move by radiation.