Mass, Weight and quantity

Question 1

Si unit for weight and Earths Gravitational pull

Answer 1

Newton, N (kgm/s^2)
9.8m/s

Question 2

Weight

Answer 2

-gravitational pull of an object
-weight depends on gravitational pull of planet

Question 3

Characteristics of mass

Answer 3

-amount of substance in an object
-mass of an object stays constant

Question 4

Definition of density, formula and unit

Answer 4

Amount of substance per unit of volume/space
Formula: Mass over volume = Density (p=m/V)
Unit: kg/m^-3

density is inversely proportionate to mass
eg: mass increase density increase