Review - 1st 6wks

1st 6wks Review

• You know it!!

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• You get one shot but one shot is all you need.

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• Lets clean it up with some REMINDERS and QUALITY practice!!

• Never - Always - Decimal

Significant Figures

• 1-9 are ALWAYS Significant

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• Leading zeros are NEVER Significant

• Sandwiched zeros are ALWAYS Significant

• Trailing zeros are only significant if there is a decimal.

Multiple Select

Pick the measurements that have 4 sig figs.

• 2500 g

• 5.000e8 miles

• 0.008 cm

• 8502 gallons

• 5578 chairs

Scientific Notation

• Decimal belongs between the first 2 sig figs

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• The superscript tells you how many times to move the decimal

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• A negative superscript tells you to move the decimal left

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• Hint - Your calculator will do it for you.

Multiple Choice

Correctly put the measurement 420.90 g into scientific notation.

• 4.2090e2

• 4.209e2

• 4.21e2

Multiple Choice

Correctly put the measurement 42090 g into scientific notation.

• 4.2090e4

• 4.209e4

• 4.21e4

Multiple Choice

Which scientific notation is written correctly?

0.0210 grams

• 2.10e-2

• 2.1e-2

• 21.0e2

Calculating Measurements

• Multiplying/Dividing Rounding Rule -

Round to the FEWEST amount of sig figs

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• Adding/Subtracting Rounding Rule -

Round to the PLACE VALULE of the LEAST

PRECISE measurement

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• Place the zero in front of the decimal (ex. 0.2)

Multiple Choice

5.20 g x 4.9 g = grams

• 25
• 25.48

• 25.5

• 30

Multiple Choice

5.20 g - 4.9 g = grams

• 0.3
• 0.33

• 0

• 0.30

Multiple Choice

40010 miles - 21000 miles = miles

• 19000
• 1900

• 20000

• 19

​Accuracy and Precision

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​Accuracy - how close you are to the real target

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​Precision - how consistent you are with your measurements

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​Precision - how many place values are in the measurement

Multiple Choice

What is the place value of the LEAST PRECISE measurement in the list below?

1000.0 miles

210 g

300 mL

21.00 cm

• hundreds

• tenths

• tens

• hundredths

• thousands

Multiple Select

Click on the least precise measurement (aka worst measurement)

• 28400

• 2.80

• 80

• 0.9

Reading Measurements

• FIRST - Find the smallest increment

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• Your estimating digit will go one place value to the right of the smallest increment.

​ ex. smallest increment is 1
estimating place value will be the
tenths place​

Fill in the Blanks

Fill in the Blanks

Multiple Choice

What place value is the estimating number in?

25.0

• ones

• tens

• tenths

• there isn't one

Equipment

• Knowing the name of the equipment you are using is important

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• Knowing what the equipment does is more important

Multiple Choice

What is it?

• Erlenmeyer flask
• erlenmeyer flask

• Erlinmeyer flask

• Erlenmeyr Flask

Multiple Choice

What does a triple beam balance or electronic balance measure?

• weight

• mass

• length

• volume

• density

Matter

• Matter = mass + volume

• ​States of Matter - solid, liquid, gas, plasma

• ​Changes in Matter - Chemical change = new matter.

• Physical change = same matter

• ​Properties of Matter - Properties describe matter

• ​Chemical and Physical Properties

• Extensive Property = changes with the amount of matter present

• Intensive Property = does not change with the amount of matter present

Not mixed evenly VS Mixed evenly

Multiple Select

Identify all of the heterogeneous mixtures

• salt water

• air

• the classroom

• chocolate milk

Multiple Choice

What is not matter?

• energy

• desk

• air

• oxygen

Multiple Choice

What state of matter is not organized and completely fills the container?

• gas

• solid

• liquid

Multiple Select

Find all of the chemical changes

• burning marshmallow

• bread to toast

• melting butter

• nail rusting

Multiple Select

Find the chemical properties

• flammable

• melting point

• not flammable

• freezing point

Multiple Select

500 mL of water represent what kind of properties?

• extensive property

• intensive property

• physical property

• chemical property

Multiple Select

The density of water is 0.969 g/cm3.

What properties identify the density of water?

• extensive propterty

• intensive property

• chemical property

• physical property

Safety

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• Number one objective in any lab is SAFETY

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• If you are not sure ask the teacher

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• Safety First!

Multiple Select

How long do you use water on your skin or eyes if you spill a chemical on them?

• 900

• minutes

• seconds

• 500

• 1100

Multiple Choice

Finish the phrase - Be WISE protect your _______!

• eyes

• organs

• skin

• phone

Multiple Select

Making ice cream involved what kind of changes?

• physical changes

• chemical changes

• no changes

Multiple Choice

What property would describe 

2 spoonful's of sugar?

• mass

• weight

• volume

• density

Your first attempt is a pretty good indicator of what will happen on the Quiz unless you over come the SEVEN SECOND RULE by using color for notes, asking questions, and TALKING about the material.
There is NO retake on this Class Quiz!