Water
1 drop milk
2 drops milk
3 drops milk
4 drops milk
Bottom
side
the
sun
(bri�ht
LED�
scattered
light
atmosphe re
(milk or water�
gro und-based s� sor
(light sen sor)
Earth
sen sor on sat� lite
(light sen sor)
s� ne lig�t fro
m t�
Scien ti sts use w� t the
y know to make a �uess about
wha t may � ppen . �� s is called a “hypothe
sis.�
place light
sen sor on
the
side
fa cing in
Measure the amount of energy coming through
the side of the glass. Record your data in table.
Add 1 drop of milk and stir. The milk
represents particles in the atmosphere.
What do you think will happen to the number if
you add a drop of milk to the water? Record your
hypothesis. Now conduct an experiment to fi nd out
if you were right.
Continue adding milk and record your observations.
Repeat steps 3 and 4 and record your data.
4
5
6
7
17
Why not � y some othe
r
li�uids as w� l� Or� ge
Juice� �oda�
Measuring from bottom: With water, the
reading will be high because light is
traveling downward. With milk, the reading
will be lower because light is scattered.
Measuring from side: With water, the reading
will be low because light is traveling
downward. With milk, the reading will be
higher because the light is scattered.
data Table
Hypothesis:
Was your hypothesis correct?
