As physicists, we have been learning about light in our unit Light Up Your World.

By the end of this unit, we will:

• Know that animals, including humans, see light sources when light travels from the source into their eyes

• Know that animals, including humans, see objects when light is reflected off that object and enters their eyes

• Know that light reflects off all objects (unless they are black). Non shiny surfaces scatter the light, so we do not see the beam.

• Know that light travels in straight lines