Everyday materials are often mixtures; Newton's laws; our solar system in a vast universe
Below is how the official curriculum organizes it. Each strand will get full lessons like the ones in Grade 1 Mathematics.
Human body systems: excretory, reproductive, hormonal and nervous
Heterogeneous mixtures and separating them; First Peoples separation and extraction methods
Newton's three laws of motion; balanced and unbalanced forces; gravity
Scale, structure and age of the universe; the solar system and the Milky Way