NGSS
4-PS3-4
2 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Grade 4 Science · Chapter 2 · Lesson 1
Changing Energy from One Form to Another
It never vanishes. It just changes clothes.
Grade 4 Science · Chapter 2 · Lesson 2
Designing a Device That Converts Energy
Fewer steps, more arrives.