Mass v.s Weight

Mass Weight
Definition The amount of substance in a body The amount of gravitational force acting on a body. 
It is also known as gravitational force or gravity.
Quantity Scalar Vector (always acting downwards)
SI Unit kg N
Constant regardless of gravitational field strength. Varies depends on the gravitational field strength
=> Depends on the location
Example On Earth: 60 kg
On Moon: 60 kg		 On Earth: 600 N
On Moon: 100 N
Measurement Instrument Beam balance or 
electronic balance		 Spring balance or 
Newton-meter
Relationship W = mg
where W = weight of the object (in N)
            m = mass of the object (in kg)
            g = gravitational field strength (in N/kg)
Gravitational field is a region where an object experiences a force due to gravitational attraction.

The force experienced is the strongest on the surface of the Earth and gets weaker further away.

Gravitational field strength is the gravitational force acting per unit mass on an object.

On Earth, g = 10 N/kg

Note that inertia is discussed at Newton’s First Law of Motion under Dynamic.
Excel@Physics