Thomson discovered the ______________ in 1897.
The energy differences in some of the rotational energy levels of the water molecule
allow cooking with ______________.
Charon is ______________ only moon.
Rocks solidified from molten material above ground are classified as ______________
igneous rocks.
The elements of Group ______________ are the most chemically active metals.
The oldest Moon rocks are about ______________ years old.
Doppler radars at airports are capable of detecting dangerous, downward
______________.
An air mass derives its characteristics from its _____________.
The particles of interplanetary dust are called ______________.
If the volume and the number of molecules remain constant for a gas, a temperature
increase causes the pressure to ______________.
______________ is the downslope movement of surface materials as a result of gravity
and of the agents that causesuch movement.
stream
When the height of an object is doubled, its gravitational potential energy is increased
by a factor of ______________.
The solar system is a complex system of moving masses held together by
______________ forces.
For a wave with a constant speed, the greater the frequency of the wave, the
_____________ its wavelength.
Comets are visible chiefly because of reflected ______________.
The fraction of incident light that a body reflects is called its ______________.
In the metric mks system of units, the letter s stands for ______________.
Give the common ionic charge for each of the following elements, and classify each as
a metal or a nonmetal.