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INTERNATIONAL SYSTEM OF UNITS (SI)
the system of units used by scientists to measure the properties of matter.
WHAT IS THE DIFFERENCE BETWEEN MASS and WEIGHT?
If you move an object away from Earth, its weight changes (because of gravity) but its mass stays the same.
HOW DO WE MEASURE MASS?
WHAT SCIENTIFIC TOOL DO WE USE?
We place an object on a triple beam balance and record the number in grams.
HOW DO WE MEASURE THE VOLUME OF A REGULAR OBJECT?
We use a ruler to measure length, width and height. Then, we multiply length x width x height to calculate volume.
HOW DO WE MEASURE THE VOLUME OF AN IRREGULAR OBJECT?
We use a graduated cylinder.
1. Measure the amount of volumen in the cylinder.
2. Add the object to the cylinder.
3. Measure the new volume.
4. Calculate the difference. The difference is the object's volume.
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