Science Grade7 /1 st term Unit1 Lesson1 Matter and its characteristics Miss :Marina George
Matter It’s anything that has a mass and volume It’s the space that is occupied by the body cm3/m3/L It’s the amount of matter that the body contains gm /kg
How can we distinguish matters? Physical properties Chemical properties
a)Physical properties 1) Color Taste Smell
2) Density
Density: It’s the mass of unit volume of a substance Or It’s the mass of one cubic centimeter
3) Melting and Boiling point
Melting point: It’s the temperature at which matter change from solid state into liquid state Boiling point: It’s the temperature at which matter change from liquid state into gaseous state