Chapter Heat , Class 7

A reliable measure of the hotness of an object is its _____________

• Heat

• Cold

• Temperature

• Heat , cold

Temperature is measured by a device called ____________

• Stick

• Thermometer

• Clinical thermometer

• Laboratory thermometer

A clinical thermometer read temperature from____________

• 35°C to 42°C

• 10°C to 110°C

• 42°C to 35°C

The normal temperature of human body is 37°C.

• True

• False

The thermometer that measures the object is called_____________

• Clinical thermometer

• Maximum and minimum thermometer

• Laboratory thermometer

The materials which allow heat to pass through them easily are called___________

• Conductors

• Insulators

• Heat

• Radiation

______________ is the mode of heat transfer in liquids and gases

• Conduction

• Radiation

• Convection

Temperature is measured in degree __________

• Celsius

• Conduction

• Convection

• Fahrenheit

One litre of water at 30 °C is mixed with one litre of water at 50°C . The Temperature of the mixture will be

• 80°C

• 20°C

• More than 50°C but less than 80°C

• Between 30°C and 50°C

What is the S.I. unit of heat

(a)