Illustrating the angles subtended at the eye by one lamp and the image of the other as seen in the mirror.
A simple practical activity that uses various methods to help students understand the idea of the expanding universe.
A progression leading to understanding falling towards Earth is presented.
How the movement of water waves from deep oceans to the shore affects waves for surfing.
Entropy is more usually studied in physics and chemistry but can also be considered in biology to explain limitations of energy changes in life-pro