SI UNITS

HOW DI D THE SI SYSTEM COME TO BE?

Countries had different ways of measuring things which made it hard to trade.

WITH NO COMMON AND CORRECT WAY OF MEASURING

• Value of items were not identified
• People need to measure what they buy in order for them to prosper

SCIENTIST COME UP WITH UNIT OF MEASUREMENT

• Helped everyone understand and communicate well doing business
• Made it easier to compare and trade products
• Measure nearly everything valuable
• Mass, length, time, temperature, amount of quantity of substance in matter,brightness or luminous intensisty of object, flow of electric current

HOW IS EACH MAIN BASE UNIT USED?

MOLE

• (mol)
• Measures quantity within an object
• Ex: atoms,mole of grapefruit would be as big as the earth

METER (M)

• (m)
• Measures distance and lenght
• Ex: measuring width and lenght of a small are

KILOGRAM

• (kg)
• Compute for mass
• Measurement of the quantity of Matter In Any Given Object
• Ex: measurment of weight

SECONDS

• (s)
• Smallest unit form to observe time
• TIME
• Ex: timing chemical reactions

KELVIN

• (k)
• Compute amount of heat in certain object
• Temperature
• Absolute scale temperature only stated in positive
• Ex: how hot or cold it is outside

AMPERE

• (A) amps
• Measure the electric current
• Ex: a typical kettle can draw about 2000 watts of power

CANDELA

• (cd)
• Measure brightness or luminous intensity of object
• Light an object emits glows or how bright it is
• Ex: how many candels are as bright as a flashlight

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