The Four Science Strands
In The Ministry of Ontario science curriculum for there are 4 strands that are covered. The following chart highlights the topics covered in each of the strands for grade 1 to 8
To access the Grade 4 Curriculum simply click on the strand and/or the grade 4 topic
Understanding Life Systems
Grade 3 - Growth and Changes in Plants
Grade 4 - Habitats and Communities
Grade 5 - Human Organ Systems 
Understanding Structures and Mechanisms
Grade 3 - Strong and Stable Structures
Grade 4 - Pulleys and Gears
Grade 5 - Forces Acting on Structures and Mechanisms
Understanding Matter and Energy
Grade 3 - Forces Causing Movement
Grade 4 - Light and Sound
Grade 5 - Properties of and Changes in Matter
Understanding Earth and Space Systems
Grade 3 - Soils in the Environment
Grade 4 - Rocks and Minerals
Grade 5- Conservation of Energy and Resources