# Basic Stuff Study Guide

Metric system/Si/ English system of measurement

• The International System of Units (SI)

• More modern form of the metric system

• This determines the base units for measurement

• The English System

• Based off of human features

• Flawed

• Only three countries besides the U.S. uses this

Units of Measurements

Metric system (SI)

English system

Mass

Gram

none

Length

Meter

none

Liquid

Liter

none

Weight

Neutron

Pound

Temperature

Celsius

Fahrenheit

Time

Second

Second

Weight v.s Mass

• Weight

• The pull of gravity on an object

• The weight of an object changes depending on where it is located

• So not so great of a measurement

• Mass

• The measurement of the number of atoms in an object

• The mass of an object stays consistent no matter the location

• A great measurement

Volume and Density

• Volume

• The amount of space an object takes up

• Formula (Solids): Base*Width*Height

Liquid Units

Solid Units

Liter

Cm3

Pint

M3

Quart

Ft3

Cup

Yd3

Mi3

• Key Idea

• Mass and volume are different

• Large objects may have a small mass and vice versa

Always read Beakers at the lowest point of the liquid

• 1 cm3 is equal to 1 mL

• Density

• The measurement of the amount of matter in a defined amount of space

• Units:

• Solid g/cm3

• Liquid: g/mL

• Density Formula is Mass/Volume

• The density of water is 1 g/mL

• If object is denser it will sink

• If object is lighter it will float