Midpoint A1 Review

Part of lab safety includes reading the lab procedure...

• before doing the lab

• while doing the lab

• after doing the lab

• only if you think you really need it

When should safety goggles be worn?

• at all times in the lab
• when you feel like it
• when liquids could splash into your eyes OR when using glassware

What should you do if you break glass in the lab?

• Tell the teacher.

• Sweep up the glass.

• Pick up the glass with your hands.

• Ignore it; the teacher will clean it up when she sees it later.

What safety symbol is this?

• Flammable 
• Oxidizing Agent
• No Open Flame
• Explosion

What does this symbol indicate?

• Corrosive substances are present; protect your hands.
• Wash your hands.
• Extreme temperatures are present; wear appropriate gloves.
• Bacteria are present.

Tags

NGSS.MS-PS1-2

• Poison/Toxic
• Bio Hazard
• Radioactive
• Corrosive

Tags

NGSS.MS-PS1-2

Put the liquids in order from most dense to least dense?

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

Tags

NGSS.5-PS1-3

Why does ice float?

• Liquid water is less dense than solid water.
• Solid water is less dense than liquid water.
• Gaseous water is less dense than solid water.
• Liquid water is less dense than gaseous water.

Tags

NGSS.MS-PS1-4

What do we know about the density of lamp oil, rubbing alcohol, and vegetable oil?  

• The density is greater than 1.0 g/mL
• The density is less than 1.0 g/mL
• The density is equal to 1.0 g/mL
• The density can not be determined

Tags

NGSS.5-PS1-3

Which liquid is the least dense?

• oil
• water
• syrup 
• plastic bottle

Tags

NGSS.5-PS1-3