9/9 & 9/10 - 7th Grade Agenda

Collect HW: Metrics Worksheet #3Lab Safety Stereo Microscope LabVideo: Lab SafetyHW: Metrics Worksheet #4HW: Poster of Science due 9/14 & 9/15(20 points)

Daily Reflection• Prompt: Why do scientists use the metric

system?

Don’t forget to write “Absent” on top of your assignment if you

were absent.

Don’t forget to work on you poster of Science

• 20 points• Due 9/14 & 9/15

Class Reading : Lab Safety Symbols (p.686-687)

Safety Goggles

Always wear safety goggles to protect your eyes in any activity involving ch_____, fl______ or heating, or the possibility of broken gl_______.

emicalames

assware

Breakable GlasswareYou are working with materials that may be breakable, such as glass containers, glass tubing, thermometers, or funnels. Handle br________ materials with c____. Do not touch broken gl_______.

eakableareassware

Heating

Use a cl_____ or tongs to pick up hot glassware. Do not touch hot objects with your bare h_____.ands

amp

Electric Shock

Avoid the possibility of electric shock. Never use electrical equipment around w______, or when the equipment is wet or your hands are wet. Be sure cords are unta______ and cannot trip anyone.

ngled

ater

Physical SafetyWhen an experiment involves physical ac_____, take precautions to avoid inj______ yourself or others. Follow instructions from your teacher. Alert your teacher if there is any reason you should not part_______ in the activity.

uring

tivity

icipate

Reflection• Prompt: Write 3 interesting observation

you made during the stereomicroscope lab. (i.e. The coin looks like …..)

Lab Safety Video

Daily Reflection• Prompt: Write 3 important Safety tips (In

Complete sentences)

Here is another way to remember the prefixes

Milli-

1/1000 Centi-1/100

Deci-1/10

Kilo-X1000

Hecto-X100

Deca-X10

King Henry Does Drink Chocolate Milk

Prefix Symbol Multiplier Exponential

yotta Y 1,000,000,000,000,000,000,000,000 1024

zetta Z 1,000,000,000,000,000,000,000 1021

exa E 1,000,000,000,000,000,000 1018

peta P 1,000,000,000,000,000 1015

tera T 1,000,000,000,000 1012

giga G 1,000,000,000 109

mega M 1,000,000 106

kilo k 1,000 103

hecto h 100 102

deca da 10 101

1 100

deci d 0.1 10¯1

centi c 0.01 10¯2

milli m 0.001 10¯3

micro µ 0.000001 10¯6

nano n 0.000000001 10¯9

pico p 0.000000000001 10¯12

femto f 0.000000000000001 10¯15

atto a 0.000000000000000001 10¯18

zepto z 0.000000000000000000001 10¯21

yocto y 0.000000000000000000000001 10¯24

For every step upward on the chart you are dividing by

10 or moving the decimal one place to the left..

100 Centimeter = _____ Decimeter10?

How do we convert from Centimeter to Decimeter?

For every step downward on the chart you are multiplying by 10 or moving one place value to

the right.

100 Kilometer = _________ Meter100,000?

How do we convert from Kilometer to Meter?

The sun is about 150,000,000,000 meters from earth

• What is another way to write the same number without writing all the zeros?

• Power or 10

• 15 X 10 meters10?

Powers of 10

101 = 10102 = 100103 = 1000

100 =10-1 =10-2 =10-3 =

1.1.01.001