Queries :

1. By what means do members of the
animal kingdom take advantage of light ?

Consider :

(a) The eyes.
(b) The position of the eyes in the differ-

ent animals; for example, in the
human being; the fish; the various
kinds of birds; the various kinds of
quadrupeds.
(c) The eyes of animals of nocturnal hab-

its ; owls, bats, cats, moles and other
midnight marauders ; is their sense of
sight important.
(d) The habits of animals without eyes, as

for example the earthworm.
(e) What experiences would not be possi-

ble, were it not for our relationship to
light, as to color, distance, etc.
2. How do plants establish their relation-
ship with light f



248 NATURE STUDY FOR

Consider:

(a) The color of the tender growing parts

that are exposed to the light.
(b) The color of the parts that are not ex-

posed to light.
(c) The color changes that occur in tender

growing parts that are usually expos-
ed when they are deprived of light.
For further development of this query
see the queries under the heads of
Germination, and Bud and Leaf
Development.
3. How do people manage to make the most
of their relationship to light; that is, how is that
relationship established and preserved ?

Consider ;

(a) The position of the eyes.
(b) The advantage of two eyes. Close one

eye and note the relative accuracy in
judging distance with but one eye.
(c) The number, size and position of win-

dows in the houses.
(d) The modes of artificial lighting that

are employed.
(e) The best position from which an object

may be seen.
Experiment: Look at some object lying on
that side which is between you and the sun.
