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===Activities===
===Activities===
[[Mensuration_informal_units_of_measurements| Activity 1 Estimating Distances]]
[[Mensuration_informal_units_of_measurements| Activity 1 Estimating Distances]]
==Concept #3. Standard units of measurements==
===Learning objectives===
# The ability to obtain accurate measurements and communicate those measurements is a key requirement for progress.
# Standardised measuring units ensure uniformity in meaurements.
# The standard unit for length is metre, for weight id kilogram, for time is second, for temperature is Kelvin and for amount of substance it is mole.
===Notes for teachers===
A unit of measurement is a definite magnitude of a physical quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same physical quantity. Any other value of the physical quantity can be expressed as a simple multiple of the unit of measurement.<br>
For example, length is a physical quantity. The metre is a unit of length that represents a definite predetermined length. When we say 10 metres (or 10 m), we actually mean 10 times the definite predetermined length called "metre".<br.
The definition, agreement, and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day. Different systems of units used to be very common. Now there is a global standard, the International System of Units (SI), the modern form of the metric system.
===Activity No #1===
for the details of the activity 1 click below<br>
[[Mensuration_Activity_2 | Hunting treasure and measuring]]
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===Activity No #2===
for the details of the activity 2 click below<br>
[[Mensuration_Activity_2 | Hunting treasure and measuring]]
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==Concept #==
==Concept #==
