First Quiz

Question 1

What is accuracy ? Precision?

Answer 1

Accuracy is the difference between a measurement and an accepted answer.
Precision is the repeatability of a measurement.

Question 2

How many sig fig in 4.53? 0.070? 2.30? 1.02? 0.707? 7.070? 4500? 7070? 3200? 0.700? 0.002? 3.4 x 10 to the fourth power? 1.000? 1.02 x 10 squared?

Answer 2

3, 2, 3, 3,
3, 4, 2, 3, 2, 3, 1
2, 4, 3

Question 3

Beaker, Erlenmeyer flask, volumetric flask, pipettes, graduated cylinder, scopula, funnel, balance, weigh paper.

Answer 3

Draw pictures

Question 4

Flammable material is like alcohol should never be disbanded or use near

Answer 4

An open flame

Question 5

If a laboratory fire erupts immediately

Answer 5

Notify your instructor

Question 6

Approved Eye protection devices such as goggles are worn in a laboratory

Answer 6

Only if you don’t have corrective glasses

Question 7

If you wear contact lenses in the school laboratory

Answer 7

Take them out before starting a lab

Question 8

If you do not understand a direction or part of a lab procedure you should

Answer 8

Ask instructor before proceeding

Question 9

After completing an experiment all chemical wastes they should be

Answer 9

Disposed of according to your instructors directions

Question 10

If a lab experiment is not completed you should

Answer 10

Discuss issue with your instructor

Question 11

You are heating a substance in a test tube always point the open end of the tube

Answer 11

Away from all people

Question 12

Your heating a piece of glass and now want to pick it up you should

Answer 12

Use tongs

Question 13

You have been injured in the laboratory first you should

Answer 13

Tell the science instructor at once

Question 14

When gathering glassware and equipment for an experiment you should

Answer 14

Read all directions carefully to know what equipment is necessary. examine all glassware to check for chips or cracks. Clean any glassware that appears dirty

Question 15

Personal eyeglasses provide as much protection as

Answer 15

Sunglasses

Question 16

Long hair in the laboratory must be

Answer 16

Tied back or kept entirely out of the way with a hairband hairpins or other confirming devices

Question 17

In a laboratory the following should not be worn

Answer 17

Loose clothing,dangling jewelry,or sandals

Question 18

The following footwear is best in the Laboratory

Answer 18

Close toed shoes

Question 19

Horseplay or practical jokes in the laboratory are

Answer 19

Always against the rules

Question 20

If a piece of equipment is not working properly stop turn it off and tell

Answer 20

The science instructor

Question 21

If an acid is splashed on you skin wash it at once with

Answer 21

Lots of water

Question 22

When you finish working with chemicals biological specimens and other lad substances always

Answer 22

Wash your hands thoroughly with soap and water

Question 23

Beakers

Answer 23

Used to stir heat or mix liquids

Not used for measuring

Question 24

Flasks

Answer 24

Erlenmeyer
You stir mix or heat liquids
Volumetric
Used for preparing solutions and dilutions

Question 25

Test tubes

Answer 25

Used for holding ,mixing or heating small quantities of substances

Question 26

Pipette

Answer 26

Used for measuring volumes and transforing liquids

Question 27

Scoopula

Answer 27

Use for transferring solids

Question 28

Funnel

Answer 28

Used for transferring substances

Question 29

Balance

Answer 29

Used for measuring mass

Question 30

Weigh paper

Answer 30

Used for measuring masses and transferring solids

Question 31

Graduated cylinder

Answer 31

Used for measuring liquids