Anything which is used as a standard for a measurement of any quantity is called Unit.
System Internation Units (SI) is the standard system which is used all over the world to measure units.
Units of Some Elements includes the following:
Length: Length is a term to identify the size of an object or distance from 1 point to another point. The SI Unit of Length is m (meter).
Mass: Mass is the quantity of matter in a body, it can be a human body, animal body or anythings body. We measure Mass in Grams (g) or Kilo Grams (kg), 1 kilo gram = 1000 grams Kilo Means Thousand.
Time: In physics, time is always measured in seconds (s). We can count seconds very roughly, without a watch, by saying at a steady rate: ONE Thousand, TWO Thousand and THREE Thousand etc…
The Other units are based on these Four units: Meter (m), Gram (g) or Kilo Gram (kg) and Second (s).
