1. matters in our surrounding Flashcards
What is diffusion?
The movement of particles from an area of high concentration to an area of low concentration
Which state of matter diffuses the fastest?
gas
What is the importance of diffusion in biological systems?
It helps in breathing and gas exchange in cells
Which law governs the process of diffusion in gases?
Graham’s Law
What is meant by the term “latent heat of fusion”?
he heat energy required to convert a solid into a liquid without a change in temperature
What is the unit of latent heat of fusion in the SI system?
Joule (J)
what is evaporation
) The process by which a liquid changes into vapor at a temperature below its boiling point
What is the effect of increased humidity on the rate of evaporation?
The rate of evaporation decreases
Increasing the surface area
The sweat evaporates, taking away heat from our body
solid to liquid =
liquid to solid =
liquid to gas =
gas to liquid=
gas to solid =
solid to gas =
solid to liquid = fusion
liquid to solid = solidification
liquid to gas = vapourization
gas to liquid= condensation
gas to solid = deposition
solid to gas = sublimation
quantity unit symbols
Temperature
Length
Mass
Weight
Volume
Density
pressure
unit symbols
kelvin k
metre m
kilogram kg
newton n
cubic meter m3
kg per cubic meter kg m–3
pascal pa
si unit of temperature
kelvin
(0°C) = 273.15 kelvin (K).
conversion formula
K=°C+273.15
Evaporation is considered a
Surface phenomenon
