Science: understanding forces

As we had finished our week's literacy work, we used our lesson time this morning to write about our new science unit on forces. Forces make things change shape, speed or direction. Here on Earth, our weight is a force that is always pulling us down. When we sit on a chair, the downward force (weight) and the upward force (from the chair) are equal and opposite. When forces are balanced (equal and opposite) nothing changes.