Below is how the official curriculum organizes it. Each strand will get full lessons like the ones in Grade 1 Mathematics.
Animal Growth and Changes: life cycles of birds, fish and mammals; human growth; how people and animals depend on each other
Liquids and Solids: properties of liquids and solids and how they interact
Motion and Relative Position: describing position; friction and other factors affecting motion
Air and Water in the Environment: properties of air and water in three states; their importance to living things