Exploring Physical and Chemical Changes in Chemistry

What is the first action to take if chemicals splash into your eyes?

• Use the eye wash station

• Ignore it if it doesn't hurt

• Run out of the lab

• Call the teacher immediately

What should you do if your safety goggles are knocked off?

• Stop working and cover your eyes

• Continue working without them

• Leave the lab to find new goggles

• Ask a partner to help retrieve them

Where should you go immediately if you spill chemicals on your skin?

• To the nearest sink

• To the wash station

• To the teacher's desk

• To the emergency exit

How long should you wash your hands if you get chemicals on them?

• 10 seconds

• 15 seconds

• 20 seconds

• 5 seconds

What is the primary use of a beaker in the lab?

• To mix chemicals

• To hold substances

• To measure liquids

• To heat substances

What should you do if you find broken glass in the lab?

• Ignore it if it's not in your way

• Sweep it under the table

• Notify the instructor immediately

• Pick it up with gloves

What type of change occurs when mixing yellow and blue paint to make green?

• Both chemical and physical

• Physical change

• Chemical change

• None of the above

What happens to magnesium when it is placed in hydrochloric acid?

• It becomes solid

• It produces bubbles and heat

• It dissolves completely

• It changes color

Tags

NGSS.MS-PS1-2

What can be observed when sodium bicarbonate is added to acetic acid?

• Color change

• No reaction

• Gas production

• Temperature drop

Tags

NGSS.MS-PS1-2

What does the disappearance of salt in water demonstrate?

• A chemical change

• A physical change

• An irreversible change

• A dangerous reaction