Question

whats the best definition of chemistry?

the study of matter and the changes it undergoes

the study of the earth and its processes

the study of living organisms

the study of stars and planets

question 2

which of these safety rules is most important to remember in chemistry class?
(hint...think about lab rules from brick and mortar classes and what would keep you safe!)

wear closed-toe shoes and goggles when needed

run to your lab station to be first

bring your lunch into the lab for long experiments

always taste chemicals to identify them

Explanation:

Question 1

• "The study of matter and the changes it undergoes" matches chemistry's definition (deals with matter, its composition, structure, and changes).
• "The study of the Earth and its processes" is geology.
• "The study of living organisms" is biology.
• "The study of stars and planets" is astronomy.

• "Wear closed - toe shoes and goggles when needed" is a key lab safety rule (protects from chemical spills, broken glass, etc.).
• "Run to your lab station to be first" is unsafe (can cause accidents).
• "Bring your lunch into the lab" is against lab hygiene/safety (contamination risk).
• "Always taste chemicals" is extremely dangerous (chemicals can be toxic).

Answer:

A. The study of matter and the changes it undergoes

Question 2