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Science CH 4 cls 7, HEAT - Coggle Diagram
Science CH 4 cls 7
Thermometers :thermometer:
Alcohol thermometers :thermometer:
They are used in cold :snowman:: weather
Mercury thermometers :thermometer:
They are used in normal :evergreen_tree: weather
Clinical :face_with_thermometer:
Temperatures from 35° to 42° Celsius :slightly_smiling_face:
Normal body temperature is 37° celsius
Laboratory :level_slider:
Temperatures from -10° to 110° Celsius :slightly_smiling_face:
Has a kink near its bulb
Min-Max Thermometer :level_slider:
Used in weather departments to find the minimum and the maximum temperatures of a day
It is the only metal which can expand and contract in the change of temperature.
Colours
Black
Good absorber of heat
Clothes with this colour are worn in winter to feel warmer
White
Good reflector of heat
Clothes with this colour are worn in summer to feel colder
Units of heat: Celcius, Fahrenheit, Kevin, Joules
HEAT
Heat transfer
Radiation (Transmission)
Heat transfer but no medium is required like heat from the sun :sunny: to Earth :earth_asia:
Anything is silvered to reduce heat transfer by radiation. Shine deflects heat
Convection
Heat transfer in fluids :factory: and :droplet: (gasses and liquids)
Hot air rises up and cold air rushes to take its place
Sea breeze:
Land gets hotter than the sea and air above the land rises while the air above the sea is colder so it rushes to the low pressure area which is formed when the hot air above the land rises.
It takes place in day time
Land breeze:
Land gets colder than the sea and the air above the sea rises and the air above the land is colder so the air above the land rushes to the low pressure area which is formed when the hotter air above the sea rises.
It takes place in night time
Conduction
Heat transfer in solids from the hotter end to the colder end