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States of Matter Timeline Project | Montessori Chemistry | History Science Cross
Show students how our understanding of matter has evolved with this States of Matter Timeline Project. Designed for grades 4–6, this hands-on activity combines history, science, and art as learners research and create a 36-inch timeline of famous experiments in chemistry and physics. Students place key discoveries about solids, liquids, gases, and plasma along the timeline, including contributions from scientists such as Robert Boyle, Joseph Priestley, Antoine Lavoisier, Dmitri Mendeleev, M
4th - 12th
Basic Principles, Chemistry, World History
Balloon Expansion Lab | Montessori Chemistry Experiment | States of Matter
Make the invisible world of particles and energy transfer visible with this hands-on Balloon Expansion Lab. Designed for grades 4–6, this experiment lets students observe how gas particles respond to temperature changes, deepening their understanding of states of matter and energy transfer. In this activity, students place a partially inflated balloon in warm water and watch it expand as the gas particles gain energy. Then, they place the same balloon in ice water and see it shrink as pa
3rd - 8th
Basic Principles, Chemistry, General Science
Design Thinking & Engineering Process Worksheet | Printable STEM Reflection
Design Thinking & Engineering Process Worksheet | Printable STEM Reflection for Grades 3-5Engage your 3rd–5th grade students with this versatile Design Thinking & Engineering Process Worksheet, perfect for any STEM or makerspace activity! This printable reflection tool guides learners step-by-step through the problem-solving process— from asking and imagining to testing and improving—while encouraging critical thinking and creativity. Whether you're running a classroom engineering challenge, a
3rd - 6th
Basic Principles, Engineering, Physical Science
NGSS
3-5-ETS1-3
, 3-5-ETS1-1
, 3-5-ETS1-2
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