The measure of the amount of matter an object contains Matter: The material that all objects and substances are made up of Anything that has mass and takes up space is matter
Mass Units of Mass The basic unit of mass in the SI system is the The basic unit of mass in the SI system is the kilogram.
What are three objects (other than in the book) whose masses would be measured in kilograms. Car Teachers Desk Desk Top Computer
A smaller objects mass such as a paper clip would be measured in Smaller objects such as a paper clip would be measure in milligrams. Conversions
1 kg = g 1g
= mg Conversions 1 kg
= 1g = 1,000 g
mg Conversions 1 kg =
1,000 g 1g = 1,000 mg
Mass Measuring Mass How does a triple-beam balance work?
A triple-beam balance works by comparing the mass of the object you are measuring to a known mass When you use a triple-beam balance, you: 1. Place the object on the pan 2. Shift the riders on the beams until them balance
the mass of the object Start with the large rider (increments of 100) Next, the medium sized rider (increments of 10)
Lastly, the small rider (increments of 1) Figure 3: Observing - What is the mass of this turtle? 153.7 grams Mass
The Difference Between Mass and Weight How would your weight differ if you were to travel to the moon? If you were to travel to the moon your weight would be less.
Your weight would be lesser because the force of gravity is less. Weight is a factor of the force of gravity Why would your mass stay constant if you were to travel to the moon?
Your mass would stay the same if you were to travel to the moon because mass is the amount of matter that an object contains Since you are still made up of the same amount of stuff, your mass would not change
Why do scientists prefer to use the mass of an object instead of its weight? Scientists prefer to use an objects mass instead of its weight because mass does not change when the force of gravity does
Reading Checkpoint (page 49): What is weight? The measure of the force of gravity acting on an object Label the different parts of the triple-beam balance.
Label the different parts of the triple-beam balance. Pan Label the different parts of the triple-beam balance. Pan
Riders Label the different parts of the triple-beam balance. Pan Riders
Beams Label the different parts of the triple-beam balance. Pan Riders
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