Which of there is an indication that a chemical reaction has occurred?
a. freezing of substance
b. a change in color of a substance
c. melting of a substance
d. boiling of a substance

Answer is (b) , because a chemical change happened

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.