Lab Safety and Scientific Method

The variable(s) you keep the same in a science experiment

• Independent variable

• Dependent variable

• Control variable

Identify the Independent variable from this question......

What brand of bleach whitens spaghetti stains on clothes better?

• Clothes whiteness

• Stains

• Brand of bleach

• None of the above

Identify the dependent variable from this question......

Which makes water freeze faster salt or sugar

• how fast the water freezes

• salt

• sugar

• None of the above

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When you draw a conclusion you should always accept or reject what?

• analysis

• question

• hypothesis

• data

Tags

NGSS.MS-LS1-5

NGSS.MS-PS1-2

You have been injured in the laboratory (cut, burn, etc.). First you should

• apply first aid yourself
• tell the science instructor at once
• see a doctor after school
• visit the school nurse after class

Whom should you call in case of an

emergency in the lab?

• teacher

• friend

• principal

• anyone will do

What should be worn in a laboratory

at all times to decrease the likelihood

of eye injury?

• contacts

• safety glasses/goggles

• mask

• nothing

What should be done if a chemical

gets in the eye?

• Use the eye-wash fountain then

  return to the experiment without

  telling anyone

• Rub your eyes

• Run to the nurse

• Notify the instructor while going to

  the eye-wash fountain

Eating and drinking is not permitted in

the lab because:

• There would not be enough time

  to finish the experiment

• The storeroom serves terrible

  appetizers

• You could be poisoned

• The lab would become quite

  messy with this type of activity

Why are no unauthorized experiments

permitted in the lab?

• Most teachers love to see only

  their selected experiments

  performed

• The students lack experience in

  the lab and it could be dangerous

• The science department may not

  have the materials that you need

• It may take more time to perform

  than expected

Tags

NGSS.HS-ETS1-3