1.2. Use of SI Units and Their Prefixes

• What does the International System of Units (SI) define?

  Measurement units
• Match the base SI unit with its corresponding physical quantity:

  meter ↔️ Length

  kilogram ↔️ Mass

  second ↔️ Time

  ampere ↔️ Electric current
• Match the base SI unit with its symbol:

  meter ↔️ m

  kilogram ↔️ kg

  second ↔️ s

  ampere ↔️ A

  kelvin ↔️ K

  mole ↔️ mol

  candela ↔️ cd
• Match the SI prefix with its multiplier:

  milli- ↔️ 10^-3

  kilo- ↔️ 10^3

  mega- ↔️ 10^6

  tera- ↔️ 10^12
• What is the multiplier for the prefix "yotta-"?

  $10^{24}$
• What is the multiplier for the prefix "micro-"?

  $10^{ - 6}$
• The International System of Units (SI) uses a set of base units to define all other derived units.
• SI prefixes are used to represent very large or very small quantities of the base units by acting as multipliers to the unit values.
• The base SI units are used to define all other derived units.
• What multiplier does the prefix 'giga-' represent?

  10^9
• The prefix "giga-" corresponds to a multiplier of $10^{9}$
• The prefix "exa-" has a multiplier of $10^{18}$
• Steps to convert units using SI prefixes:

  1️⃣ Identify the prefixes you need to convert between

  2️⃣ Find the corresponding multipliers

  3️⃣ Multiply or divide the original value by the ratio of the multipliers
• The International System of Units (SI) uses base units to define all other derived units.


  True
• Match the prefix with its multiplier:

  tera- ↔️ $10^{12}$

  nano- ↔️ $10^{ - 9}$

  centi- ↔️ $10^{ - 2}$

  kilo- ↔️ $10^{3}$
• The multiplier for "kilo-" is $10^{3}$
• Which base SI unit measures thermodynamic temperature?

  kelvin
• What is the symbol for the base SI unit of length?

  m
• What is the multiplier for the prefix "milli-"?

  $10^{ - 3}$
• What system is used for converting units in this study material?

  International System of Units
• What operation is performed to convert between units using multipliers?

  Multiply or divide
• What multiplier does the prefix 'milli-' represent?

  10^-3
• How many meters are in 42.2 kilometers?

  42,200 meters
• The base SI unit for measuring length is the meter
• The base SI unit for measuring mass is the kilogram
• The prefix "kilo-" has a multiplier of $10^{3}$
• The first step in converting units is to identify the prefixes
• To convert 5000 meters to kilometers, you divide by 1000
• Match the prefix with its multiplier:

  kilo- ↔️ 10^3

  mega- ↔️ 10^6

  milli- ↔️ 10^-3

  micro- ↔️ 10^-6
• How many base SI units are there?

  7
• The base SI units are the foundation for all other derived units.


  True
• The candela (cd) is the SI unit for luminous intensity.


  True
• The prefix 'milli-' corresponds to a multiplier of 10^-3.
• The prefix "milli-" has a multiplier of $10^{ - 3}$


  True
• The prefix "micro-" is represented by the symbol "μ".


  True
• Convert 5000 meters to kilometers.

  5 km
• Match the base SI unit with its quantity:

  meter ↔️ Length

  kilogram ↔️ Mass

  second ↔️ Time

  kelvin ↔️ Temperature
• The seven base SI units include the candela, which measures luminous intensity.


  True
• SI prefixes act as multipliers to base unit values.


  True
• Steps to convert units using SI prefixes:

  1️⃣ Identify the prefixes you need to convert between

  2️⃣ Find the corresponding multipliers

  3️⃣ Multiply or divide the original value by the ratio of the multipliers