Catalyst

CATALYST1. Set up yourCornell notes by:

a) Putting the heading (metrics) at the top left

b) Gluing the notes on the right side.

2. Answer the catalyst questions on your notes

3. Turn in your SCIENTIST picture.

OBJECTIVES

SWBAT:-explain why we need the metric system- distinguish between metric units- understand why we need different sized units

ENGLISH SYSTEMYou are familiar with inches, feet, miles, pounds, quarts, and so on.This is not an easy system!

How many inches in 1 foot?12 inches

How many feet in a yard?3 feet

How many yards in a mile?1760 yards

METRIC SYSTEMMetric system is decimalized, meaning it has a base of 10This means that each unit is 10 times bigger or smaller than the next.

This makes it much easier!

WHY DO WE USE THE METRIC SYSTEM?

We use the metric system because we can easily manipulate metric units into more useful sizes and measures.We start with a base unit and manipulate it to make smaller or bigger

METRIC SYSTEM• Another goal of the metric system is to have a single unit for any physical quantity across the world.

• This allows scientists to communicate in a standard mathematical language regardless of where they come from!

Metric System – Base Units

Base quantityUnit

Name SymbolLength meter mMass gram gTime second s

Liquid Volume liter l Pay attention to the symbols!

BASE UNITSMeter length

Length of a tableHeight of a person

Gram massMass of a pencilMass of a calculator

BASE UNITSSeconds time

Time for a pencil to fall to the ground

Liters liquid volumeAmount of liquid in a monster

canAmount of water in a cup

METRIC PREFIXESIn the English system, there are

inches, feet, yards, and miles to measure length

In the metric system, we add prefixes to our base units to create larger and smaller unitsPrefix- placed at the beginning

METRIC PREFIXESPREFIX SYMBOL

Kilo- k-Hecta- H- Deca- D-

Base Unit m, l, s, gDeci- d-Centi- c-Milli- m-

Units

get

sm

alle

rUnits get larger

METRIC PREFIXES

PREFIX SYMBOLKing Kilo- k-

Henry Hecta- H- Does Deca- D-

Base Unit m, l, s, gDrink Deci- d-

Chocolate Centi- c-Milk Milli- m-

Mnemonic Device – will help us remember the metric prefixes

PREFIXES + BASE UNITS

To create smaller or larger units we combine the prefixes with the base unitsKilo (k) + meter (m) = kilometer (km)Kilo (k) + gram (g) = kilogram (kg)

PREFIXES + BASE UNITS

To create smaller or larger units we combine the prefixes with the base unitsKilo (k) + meter (m) = kilometer (km)Kilo (k) + gram (g) = kilogram (kg)Centi (c) + liter (l) =

PREFIXES + BASE UNITS

To create smaller or larger units we combine the prefixes with the base unitsKilo (k) + meter (m) = kilometer (km)Kilo (k) + gram (g) = kilogram (kg)Centi (c) + liter (l) = centiliter (cl)Milli (m) + second (s) =

PREFIXES + BASE UNITS

To create smaller or larger units we combine the prefixes with the base unitsKilo (k) + meter (m) = kilometer (km)Kilo (k) + gram (g) = kilogram (kg)Centi (c) + liter (l) = centiliter (cl)Milli (m) + second (s) = millisecond (ms)Milli (m) + meter (m) =

PREFIXES + BASE UNITS

To create smaller or larger units we combine the prefixes with the base unitsKilo (k) + meter (m) = kilometer (km)Kilo (k) + gram (g) = kilogram (kg)Centi (c) + liter (l) = centiliter (cl)Milli (m) + second (s) = millisecond (ms)Milli (m) + meter (m) = millimeter (mm)

PREFIXES + BASE UNITS

Now you try Hecta (H) + meter (m) =deci (d) + gram (g) =Centi (c) + meter(m) =Deca(D) + second (s) =Kilo (k) + liter (l) =

PREFIXES + BASE UNITS

Now you try Hecta (H) + meter (m) = Hectameter

(Hm)deci (d) + gram (g) = decigram (dg)Centi (c) + meter(m) = centimeter

(cm)Deca(D) + second (s) = Decasecond

(Ds)Kilo (k) + liter (l) = kiloliter (kl)

HOW BIG ARE THE PREFIXED UNITS?

Kilometers - distances between citiesMeters – height of peopleMillimeters – length of ants.

Kilograms – mass of peopleGrams – mass of drops of waterMilligrams – mass of medicinal tablets

SUMMARY/QUESTIONS

1. What is the metric system?2. What are metric units?

3. What are metric prefixes?Take 4 minutes to write your summary for today and then questions and headings on

the left side of the notes

REMINDERSHomework packet #1 due Friday!

Quiz 1 on Friday

Get a science fair notebook by Wednesday