MASS
Definition Of Mass
Mass is the quantity of matter in an object.
More About Mass
Mass is often called as weight.
Mass can be measured in both metric and customary units.
Kilogram, gram, and milligram are the metric units whereas ounces and pounds are the customary units.
Examples of Mass
Suppose a sandwich weighs 7 ounces then the same mass in grams is approximately 200 grams.
As 1 ounce is about 28 grams then 7 ounce=7 × 28 
200 grams.
Video Examples: Pound Force to Pound Mass Conversion : Physics & Math
Solved Example on Mass
Ques: Which of the following metric units would you use to measure the weight of a pizza?
Choices:
A. grams
B. millimeters
C. seconds
D. liters
Correct Answer: A
Solution:
Step 1: Grams is used to measure not too small and not too large weights.
Step 2: Seconds is a unit of time, liters is a unit of volume and millimeters is a unit of length.
Step 3: So, the best metric unit to measure the weight of a pizza is grams.
Quick Summary
- Mass is the amount of 'stuff' in an object.
- Mass is often confused with weight, but they are different.
- Mass is measured in grams, kilograms, ounces, and pounds.
🍎 Teacher Insights
Use everyday objects to demonstrate mass. Use a balance scale to compare the mass of different objects.🎓 Prerequisites
- Basic Arithmetic
- Units of Measurement
Check Your Knowledge
Q1: Which of the following is a unit of mass?
Q2: Mass is the amount of ______ in an object.
Frequently Asked Questions
Q: What is the difference between mass and weight?
A: Mass is the amount of matter in an object, while weight is the force of gravity acting on that mass. Weight can change depending on the gravitational pull, but mass stays the same.
Q: What are the units of mass?
A: Common units of mass include grams (g), kilograms (kg), ounces (oz), and pounds (lb).