Science 1.3 Form 1

• The common base quantitities used are length, mass, time, temperature and electric current.
• The S.I unit for length is metre. The symbol of S.I unit is m
• The S.I unit for mass is kilogram. The symbol of S.I unit is kg
• The S.I unit for time is second. The symbol of S.I unit is s
• The S.I unit for temperature is kelvin. The symbol of S.I unit is K
• The S.I unit for electric current is ampere. The symbol of S.I unit is A
• Prefixes can be used if the value of a physical quantity unit is too big or too small
• The value of a giga is 1,000,000,000. The symbol is G
• The value of a mega is 1,000,000. The symbol is M
• The value of a kilo is 1,000. The symbol is k
• The value of a deci is 0.1. The symbol is d
• The symbol of a centi is 0.01. The symbol is c
• The value of a milli is 0.001. The symbol is m
• The value of a micro is 0.000,001. The symbol is μ
• The value of a nano is 0.000,000,001. The symbol is n