Unit 4 from Grade 4 Science and Technology from the Ontario Curriculum.
All the information is from personal research, but followed the same outline the Ministry of Education has outlined to be the expectations for Grade 4. It introduces what matter and energy are, and then what light and sound are, how they are similar, and how they affect society and why they're important
Discusses with "matter" and "energy" are as well as explains what light and sound are in relation to matter and energy.
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