Thinkabara

🔬 5th Grade · Science5-PS1-2Unit 1: Structure & properties of matter

Conservation of matter

Google Classroom

🎯 Objective: Students measure that weight stays the same through changes.

Lesson outline

  1. Weigh before and after melting and mixing.
  2. Record.
  3. Discuss.
  4. Exit: what happened to weight?

Lesson 2 of 4 in this unit. In the Lesson Planner this lesson takes 1–3 class periods depending on your timetable: day 1 introduce & model, then practice, small-group reteach and a quick check.

📐 Standard

5-PS1-2

Next Generation Science Standards (NGSS), Grade 5 — typical US unit order

🏁 Unit goals

  • Model matter as tiny particles
  • Show weight is conserved
  • Identify materials and observe reactions

✅ Check for understanding

End with the exit ticket in the outline. Sort answers into got it / almost / not yet and start the next lesson with a 5-minute reteach for the “not yets”.

Practice & resources on Thinkabara

🦫 Encyclopedia: Science🦫 Kids encyclopedia⚡ Capy Live class quiz

🗓️ Plan the whole year like this

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More lessons in “Structure & properties of matter”

  1. Particles too small to see
  2. Conservation of matter
  3. Properties of materials
  4. Mixing substances

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