Contrast mixtures with pure substances

Mixtures

consist of two or more substanceshave a variable compositioncan be separated into their components by physical means

Pure substances

consist of a single element or compoundhave a definite and constant compositioncannot be separated into their components by physical means

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.