Question

1. what kind of changes do these words indicate? physical or chemical

a. boil
b. freeze
c. condense
d. crush
e. vaporize
f. explode
g. tarnish
h. ferment
i. burn
j. corrode

Explanation:

Physical changes involve changes in state or form without altering the chemical composition. Chemical changes result in the formation of new substances. Boiling, freezing, condensing, crushing, and vaporizing are physical changes as they only change the state or shape. Exploding can be physical (e.g., a pressure - related explosion) or chemical (e.g., an explosion from a chemical reaction). Tarnishing, fermenting, burning, and corroding are chemical changes as new substances are formed.

Answer:

A. Physical
B. Physical
C. Physical
D. Physical
E. Physical
F. Can be physical or chemical
G. Chemical
H. Chemical
I. Chemical
J. Chemical