Metric System

%%International System of measurements → S.I. Units%%

Base SI Units: ( you can directly measure these 7)

• Length (distance) → Meter
• Mass (Mass and Weight are not the same! Don’t confuse them! Weight is defined by gravity while Mass stays the same no matter where you are) → Kg
• Volume
• Time → Seconds
• Temperature → K
• Amount of substance → Mole
• Luminous Intensity (Brightness) → Candela
• Electric current → Ampere

%%Derived Unit(s)%%

• Area (distance x distance)
• Energy → Joule (distance x distance x mass/time^2)
• Volume (distance x distance x distance)

  → Always written in mL or cm^3

mL is for liquids CM is for solids

• Density → Mass/Volume

%%Prefixes%%

→ Kilo - x 1,000 *

→ Hecto - x 100

→ Deka - x 10

→ Deci - Divide by 10 *

→ Centi - Divide 100 *

→ Mili - Divide by 1,000 *

%%Practice Questions%%

1. 18kg → 18,000 grams
2. 340 grams → 0.34 kg
3. 87 deci → 8.7s
4. 42cm → 0.42

1kg = 1,000 g

1g = 10dg

1g= 100 cg

1g = 1000 mg