Uncover how and why things work in our universe with 15 essential scientific concepts that involve topics in states of matter, The Periodic Table, vibrations and chemical reactions. This resource provides suggestions for differentiating instruction to meet the needs to all readers and offers four visually identical texts for each topic, each suited for below, on, and above grade levels, and English language learners. Each high-interest informational text is perfect for close reading or small-group instruction and is complemented with comprehension questions specific to each reading level. This resource is aligned to college and career readiness standards.