Heat Grade 8

Heat transfer from ...

• Higher temperature to lower tempprature

• Lower temperature to higher temperature

• Colder object to hotter object

When we touch a warm water, we feel hot. It is because

• The heat moves from the water to our hand

• The heat moves from our hand to the water

• The water has lower temperature than our hand

How to measure how hot or cold an object is?

• To compare using our hands

• To compare with other people hands

• To use thermometer

Which one is NOT the unit of temperature?

• Celcius

• Fahrenheit

• Newton

• Kelvin

Here is a labelled diagram about a liquid-in-glass thermometer. What is A?

• Bulb

• Liquid thread

• reading

• scales

• Stem

Here is a labelled diagram about a liquid-in-glass thermometer. What is the function of E?

• To absorb the heat

• Expands when there are heat

• Show the measured temperature

• Show the magnitude of temperature

• To hold the thermometer

Here is a labelled diagram about a liquid-in-glass thermometer. What is the function of B?

• To absorb the heat

• Expands when there are heat

• Show the measured temperature

• Show the magnitude of temperature

• To hold the thermometer

Here is a labelled diagram about a liquid-in-glass thermometer. What is the reading of this thermometer?

• 25 degree C

• 20.5 degree C

• 25 degree J

• 20.5 degree K

Which thermometer precaution is correct?

• P

• Q

• R

• S

Which statement is WRONG about the thermal expansion and thermal contraction?

• Thermal expansion is increase in volume

• When an object receives heat heat, it expands

• Thermal contraction is increase in volume

• When an object releases heat heat, it contracts