for Rainbow Day
students will describe how rainbows form.
- Ask the students what the
know about rainbows forming. When do we see
them? Why do they occur? Have the students
make a hypothesis about why rainbows occur.
- Discuss the 7 colors that
make up a rainbow - ROY G. BIV.
- If it's a sunny day, fill
a glass with water and place it in a sunny
window. A rainbow may be picked up on a white
sheet of paper angled below the glass. This may
be done as a teacher demonstration, or small groups of
students may be given their own glass to experiment
with, depending on the age. Sometimes a mirror
angled in the water can help to create a rainbow as
well. Another option would
be using prisms if they are available. Then the
students may experiment with the prisms in the
sunlight. Remind the students that the prisms
are taking the place of raindrops in nature.
- If it's not a sunny day,
skip right to this step and read the selected book
about the formation of rainbows. The
aforementioned web sites also offer good information
which can be altered to the students' ability of
- Once the information has
been presented, ask the students if their hypotheses
- Have the students complete
a Rainbow Forms Worksheet.
- If possible, go outside on
a sunny day, use a hose and create rainbows. The
sun should be at your back when spraying the water.
- Have a more in depth
lesson on rain and the water cycle.
- Have a lesson on the light
- Have a lesson on light
refraction (the bending of light).