Some of these questions might be written on the board to guide discussion: Elements: How are they like bricks? ... Compound Y is made up of one oxygen atom bonded to two hydrogen atoms. ... Answer Key Discussion: Before looking at the Answer Key, students should discuss how they reasoned the answers to the exercise questions. Lesson 4 Mixtures and Solutions Lesson Warm-Up Vocabulary: Write the following words on the board or overhead and read them aloud: dissolved, anbsp;...