Mass Lab

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# Mass Lab - PowerPoint PPT Presentation

Mass Lab. The metric system is a system of measurement used throughout the world by scientists. The basic unit of measurement for mass is the gram . . Purpose: To practice measuring objects in grams and convert those units to decigrams, milligrams, and kilograms. Background:

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Presentation Transcript

### Mass Lab

The metric system is a system of measurement used throughout the world by scientists. The basic unit of measurement for mass is the gram.

Purpose:To practice measuring objects in grams and convert those units to decigrams, milligrams, and kilograms.

Background:

The metric system is based on the number ____. Because of this, it is easy to convert units of measurement into larger or smaller units, depending on what you are measuring. For example, if I measured the mass or an elephant, I would use __________ grams. But if I wanted to measure the mass of a butterfly, I would use ______ grams.

10

Kilo

Milli

Calculate
• There are _____ cg in a gram.
• There are _____ mg in a cg.
• Therefore, there are ______ mg in a gram.
• One decigranis equal to ____ cg.

100

10

1000

10

Procedures
• Move all weights to zero and confirm that the arm is balanced at the zero mark
• Place your first object on the pan
• Move the 100s weight over until the arm drops below zero, then move it back one grove and lock it in place. Record this number.
• Repeat for the 10s weight. Record this number.
• Slide the 1s weight over until the arm is balanced at zero. Record this number to 1 decimal place.
• Add up the total mass of the object.
• Repeat for the remaining 9 objects
• Convert to decigrams, milligrams, and kilograms
Analysis Questions
• Draw a sketch of the scale and label: pan, weights, arm, zero mark
• Why should your balance read zero before you place an object on the pan?
• What object had the largest mass? How many grams?
• What object had the smallest mass? How many grams?
• Was it easier to find the mass of an object with a lot of mass or a little amount of mass? Explain why.