GRADE 8 SCIENCE · CHAPTER 3
Forces, energy & waves
Study each lesson in order, or choose the idea you need today.
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Waves
Connect wave measurements
Use stated wave speed, frequency, wavelength and amplitude definitions to interpret simple measurements.
AN EXAMPLE FROM THIS CHAPTER
Wave speed = frequency × wavelength. A wave has frequency 3 Hz and wavelength 2 m. What is its speed?
Show answer & explanation
6 m/s
3 cycles/s × 2 m/cycle = 6 m/s.
Curriculum & source notes
These are original Little Play study books organized around U.S. school topics. The official curriculum references below guide topic scope and progression. Coverage is selected, not a complete curriculum or a verified match to every state standard. They are not copies of a publisher’s textbook. Check your school’s syllabus and book edition.
High-school courses can be taken in different years. Choose the topic that matches the student’s current course.
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