Units of Measurements

Introduction:

In the field of science and mathematics, units of measurement are essential for quantifying physical quantities. They provide a standard and consistent way to express the magnitude of a measured quantity. There are various types of units of measurement, including base units and derived units.

Base Units

Base units are the fundamental units from which all other units are derived. They are independent and cannot be expressed in terms of other units. In the International System of Units (SI), there are seven base units:

1. Meter (m) - used to measure length or distance.

2. Kilogram (kg) - used to measure mass.

3. Second (s) - used to measure time.

4. Ampere (A) - used to measure electric current.

5. Kelvin (K) - used to measure temperature.

6. Mole (mol) - used to measure the amount of substance.

7. Candela (cd) - used to measure luminous intensity.

These base units serve as the building blocks for the derived units.

Note: You will need to know & memorize these 7 base units for the IB exam.

Derived Units

Derived units are obtained by combining the base units in various ways. They express quantities that are derived from the base units. Examples of derived units include:

1. Square meter (m²) - used to measure area.

2. Cubic meter (m³) - used to measure volume.

3. Newton (N) - used to measure force.

4. Joule (J) - used to measure energy.

5. Volt (V) - used to measure electric potential.

6. Celsius (°C) - used to measure temperature.

7. Hertz (Hz) - used to measure frequency.

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