You will be the Earth and the lamp
will be the sun.
First turn the lamp on and shut any other lights off. Hold your arms out and
stand so that the lamp is on your left side and you left arm is pointed toward
the lamp. This is sunrise.
Turn toward your left so that the lamp is in front of you. It is the middle
of the day, or noontime.
Turn again so your right hand is pointed toward the lamp. The light is moving
away from you which is like the sun going down. This is sunset.
Turn again so your back is toward the lamp. This is night. Notice that it is
still light in back of you. On this side of the Earth it would now be day while
the other side has night. Part of you is in the light while the other half is
in the dark. When the Earth rotates, the same thing happens.
