The students determined that a new substance formed and a chemical reaction took place. Which pieces of evidence from their observations best support this conclusion? Group of answer choices

substance dissolves, precipitate forms, color changes

color changes, temperature changes, precipitate forms

state change occurs, gas is released, substance dissolves

temperature changes, production of a gas, color changes

1. o2(g)as a product

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.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

Butterfly wingspan is 7.7