Mass and Weight

For children aged 14 years

Mass is usually measured in kilograms which is abbreviated as kg.
In physics there are different ways of determining the quantity of mass. 

Two of the most commonly used are inertial mass and gravitational mass.

• Inertial mass - Inertial mass is determined by how much the object resists acceleration. For example, if you push two objects under the same conditions with the same amount of force, the object with the lower mass will accelerate faster.
• Gravitational mass - Gravitational mass is a measurement of how much gravity an object exerts on other objects. It can also be the measurement of how much gravity an object experiences from another object.

 What is the difference between mass and weight?

1. Weight is different from mass. 
2. Weight is the measure of the force of gravity on an object. 
3. The mass of an object will never change, but the weight of an item can change based on its location. 
4. For example, you may weigh 100 pounds on Earth, but in outer space you would be weightless. 
5. However, you will always have the same mass on Earth as you have in outer space.  source