1.1 Use of SI units and their prefixes

• SI units are important because they provide a universal language for scientific and technical communication
• SI base units form the foundation for measuring physical quantities in a standardized way.


  True
• What is the purpose of using prefixes with SI units?

  To denote multiples or submultiples
• To convert 2500 meters to kilometers, divide 2500 by $10^{3}$
• To convert between different SI units, you need to apply the corresponding prefix
• What is the result of converting 3500 meters to kilometers?

  3.5 km
• 2,500 grams is equal to 2.5 kilograms.


  True
• What are the seven SI base units?

  Length, mass, time, current, temperature, substance, intensity
• SI units are essential for providing a universal language for scientific and technical communication
• Match the prefix with its multiplication factor:

  Tera ↔️ 10^{12}</latex>

  Giga ↔️ $10^{9}$

  Mega ↔️ $10^{6}$

  kilo ↔️ $10^{3}$
• 2500 meters is equal to 2.5 kilometers.


  True
• To convert 2500 meters to kilometers, you divide 2500 by 10^3
• What does the acronym SI stand for?

  International System of Units
• Match the SI base unit with its corresponding quantity:

  Meter ↔️ Length

  Kilogram ↔️ Mass

  Second ↔️ Time

  Ampere ↔️ Electric current
• What is the SI base unit for the amount of substance?

  Mole
• Order the SI base units from length to luminous intensity:

  1️⃣ Meter

  2️⃣ Kilogram

  3️⃣ Second

  4️⃣ Ampere

  5️⃣ Kelvin

  6️⃣ Mole

  7️⃣ Candela
• What is the multiplication factor associated with the prefix Giga?

  $10^{9}$
• Match the SI prefix with its multiplication factor:

  Micro ↔️ $10^ - 6$

  Nano ↔️ $10^ - 9$

  Pico ↔️ $10^ - 12$
• What is the result of converting 3500 meters to kilometers?

  3.5 km
• A kilometer is 10^3 times a meter.
• What is the first step in converting between SI units using prefixes?

  Identify the prefixes
• The prefix 'kilo' has a multiplication factor of 10^3.


  True
• Match the prefix with its multiplication factor:

  Tera ↔️ 10^12

  Giga ↔️ 10^9

  Mega ↔️ 10^6

  kilo ↔️ 10^3
• The prefix 'Tera' has a multiplication factor of 10^12.


  True
• The prefix 'centi' has a multiplication factor of 10^-2.


  True
• The prefix 'milli' has a multiplication factor of 10^-3.
• The prefix 'pico' has a multiplication factor of 10^-12.


  True
• 2500 meters is equal to 2.5 kilometers


  True
• SI units provide a universal language for scientific and technical communication
• The SI base unit for time is the second
• The seven SI base units form the foundation for measuring physical quantities in a standardized way.

  True
• SI prefixes are used to denote multiples or submultiples of the base units
• The prefix Tera has a multiplication factor of $10^{1}2$


  True
• Steps to convert between SI units using prefixes:

  1️⃣ Identify the prefixes

  2️⃣ Know the multiplication factors

  3️⃣ Apply the conversion
• The prefix 'kilo' has a multiplication factor of 10^3.


  True
• A kilometer is 10^3 times a meter.
• What are SI prefixes used to denote?

  Multiples or submultiples
• The prefix 'Giga' has a multiplication factor of 10^9.
• What is the multiplication factor for the prefix 'deci'?

  10^-1
• What is the multiplication factor for the prefix 'micro'?

  10^-6