Name of Investigation - 1st Law of Motion - Inertia

inside the lower chamber. The pressure pushes the liquid up the tube (____________ rises,
you know). When there is more liquid in the top part of the bird, the bird becomes
unbalanced and dips its head into the glass of water. When the ___________(material) on
the head and beak absorbs the water, the liquid begins to cool. This cooling causes the
pressure in the head area to become ___________________ (higher / lower). As the water
evaporates, the liquid becomes ________________ and the pressure changes. This allows
the liquid to return to the lower chamber of the bird. Each dip of the bird wets the felt
surface of the beak and head and the cycle is repeated.
This bird is a simple ______________ _______________. The bird takes _____________
from the room (or hand or lamp) into the lower chamber and changes the heat into
__________________________________ (potential / mechanical) energy just like a steam
engine does. It is this kind of energy that causes the bird to “work.”
Evaporation = _______________________
The temperature difference of the bird is primarily a result of cooling by
________________________________. The ____________________(faster/slower) the
evaporation, the slower the rate of bobbing.