IPC - Safety - Sci Notation - Reading Measurements

Safety in the lab is the most important!

Multiple Choice

When should you report any accidents (spill, breakage etc) or injuries to the teacher?

• Only if someone gets hurt
• Immediately - when they happen
• After you have cleaned everything up.
• Never.

Multiple Choice

In what condition should the work areas should be kept? 

• As messy as you like - mess equals creativity.
• Clean and tidy at all times
• Clean and tidy if there is time, if not the next group will clean up.
• With all your books, laptops and art materials on them, in case they are needed.

Multiple Choice

This should be tied up when working with certain tools and materials

• shoe laces
• jackets
• hair

Multiple Choice

Your safety is the responsibility of

• the teacher

• your classmates

• You and everyone

Multiple Choice

What is the best thing to do before using tools?

• get permission from your teacher

• read the instruction manual

• use it quickly, so others can use it

Multiple Choice

During a chemistry observation, you may do all the following EXCEPT

• Look

• Taste

• Smell

• Discuss

Multiple Choice

When working in the lab it is the expectation that...

• you work with only members of your group with a business like attitude
• you ask questions when in doubt about procedures
• you clean up before lab if needed and as you are doing lab 
• all of the above

Multiple Choice

Horseplay, jokes, and pranks are appropriate in the lab at any time.

• True
• False

Multiple Choice

What do you do if chemicals get in your eye.

• Run and scream to the hospital.
• Tell your teacher and wash your eyes out in eye wash station for 15 minutes
• Ignore it.
• Wash the eye with chemicals and let it run into your other eye

Multiple Choice

what do you do if chemicals get on your skin?

• i don't know ask Siri!
• just leave it alone
• call your mother in havoc
• Wash with water for 15 minutes and notify teacher 

Multiple Choice

When instructed by your teacher, ___ must be worn at all times. 

• goggles
• shirts
• pants
• shoes

Multiple Choice

What should you do when carrying chemicals?

• Run with them

• Perform a backflip with a beaker in your hand

• Walk with them

• Drop them on the ground

Multiple Choice

Which of the following is appropriate behavior during lab?

• Talk to your group and work on the lab

• Go and talk to a person in another group

• Play around with the equipment instead of performing the experiment

• Go on your phone, ignore your labmates, and don't participate in the lab

Multiple Choice

Where should you return your equipment, chemicals and goggles?

• Drink the chemicals and eat the goggles

• To the sink

• Give them to the teacher or pile them on her desk in a big heap

• Return to the designated location

Multiple Choice

When is it OK to play around in the lab?

• Never

• It is OK if the teacher leaves the room to help an ill student.

• It is OK if the students are doing a lab and a substitute is in the room.

• It is OK to play in the lab on Fridays.

Scientific Notation

Reminders:

Don't forget about the "e" on the calculator
Don't forget to use your calculator to help you.
The exponent tells you how many times to move the decimal
A positive exponent moves right
A negative exponent moves left

Multiple Choice

How would you write 4.3756 x 10⁴ in standard form?

• 437,560,000
• 0.00043756
• 43,756
• 4,3756

Multiple Choice

How would you write 0.0005 in scientific notation?

• 50 x 10⁵
• 5 x 10⁴
• 5 x 10³
• .5 x 10³

Multiple Choice

How would you write -5.6 x 10^-3 in standard form?

• 0.0056
• -5,600
• 0.00056
• -0.0056

Multiple Choice

How do you write
1001
in scientific notation?

• 1.0001 x 10⁴
• 1.01 x 10⁵
• 1.001 x 10³
• 10.1 x 10³

Multiple Choice

How do you write
8.317 x 10⁶
in standard form?

• 8, 371, 000
• 83, 170, 000
• 837, 100
• 8, 317, 000

Multiple Choice

Convert to standard notation:
2.4 x 10^-3 

• 2400
• 0.24
• 0.024
• 0.0024

Multiple Choice

What is scientific notation?

• A long way to write really short  numbers
• A short way to write really long numbers
• I don't know...
• None of the above

Multiple Choice

Express the following in scientific notation:
0.0000002203

• .02203 x 10⁷
• 22.03 x 10^-6
• 2.203 x 10^-7
• 22.03 x 106

Multiple Choice

UNDERSTANDING
If the exponent is a positive number...

• you will get a large number
• you will get a smaller number

Multiple Choice

UNDERSTANDING
If the exponent is a negative number...

• you will get a large number
• you will get a small number

Reading Measurements

Reminders

You must calculate the smallest increment (subtract and divide)
You find your guessing number from the smallest increment.
Stop when you get to your guessing number.
Always read the bottom of the meniscus (bottom of curve)

Multiple Choice

How many estimated digits should there be when reading a measurement from a piece of lab equipment?

• 0
• 1
• 2
• 3

Multiple Choice

A student correctly reads a thermometer as 37.9^oC. Which one of these would still be a correct reading from another student?

• 37.8

• 40.0

• 38.9

Multiple Choice

Which of the following choices best represents the length reading from the metric ruler pictured?

• 87 mm

• 87.4 mm

• 87.40 mm

• 87.400 mm

Multiple Choice

Which of the following choices best represents the length reading from the metric ruler pictured?

• 0.8 cm

• 0.80 cm

• 0.800 cm

• 8 cm

Multiple Choice

Which of the following choices best represents the volume reading from the graduated cylinder pictured?

• 61 mL

• 61.5 mL

• 67 mL

• 67.0 mL

Multiple Choice

Type in the measurement on the graduated cylinder to the correct number of significant digits. No unit.

• 6.300

• 6.3

• 6.32

• 7.70

Multiple Choice

Read the graduated cylinder

• 76.0

• 76.15

• 71.9

Multiple Choice

This refers how close a group of measurements are to eachother

• estimate
• accuracy
• precision
• mean

Multiple Choice

This refers to how close the measurement is to the true or accepted value

• estimate
• accuracy
• precision
• mean

Multiple Choice

The curve a liquid makes in a graduated cylinder is called a ......

• meniscus

• the curve

• smallest increment