Density and Matter
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This course is the third in the General Science series. It focuses on Density and Matter.
The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume
In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, “matter” generally includes atoms and anything made up of them, and any particles (or combination of particles) that act as if they have both rest mass and volume.
This course will aim at helping learners:
a) understand density and its meaning
b) applications of density
c) understand density and relative density
a) understand what matter is and identify different states of matter.
b) use the knowledge of kinetic theory and particle nature of matter to explain the states of matter and their properties.
c) know the factors that affect the rate of diffusion of a gas.
d) use the scientific knowledge of the particle theory to explain common phenomena such as gas pressure, drying clothes, rain formation and making a cup of tea.
e) understand the processes of change of state such as melting, boiling, evaporation, condensation, freezing and sublimation in terms of either heat gain or heat loss.
f) compare physical and chemical changes.
g) categorise processes in daily life as physical or chemical changes.
- Meaning of DensityLecture1.1
- The Density of Different SubstancesLecture1.2
- Density and its Application to Floating and SinkingLecture1.3
- Density and Relative DensityLecture1.4
- Density Quiz 10 questions15 minQuiz1.1