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Matter waves are also called ______________ waves.
"Canals" are a feature once associated with the planet ______________.
Solids, liquids, and gases are called ______________ of matter.
Gravity acting on ______________ played an important role in the condensation
process of forming nebulae.
The volume of space over which the _______________ extends is called the
heliosphere.
Reflection from smooth surfaces is called ______________ reflection.
The major contribution in heating the troposphere comes from ______________.
In 1851, Earth's rotation was demonstrated using a(n) ______________.
The ______________ scale gives an absolute measure of the energy released by an
earthquake.
A(n) _____________is denser than a neutron star.
What is the frequency, in hertz, of a sound wave (v= 340 m/s) with a wavelength of
0.20 m?
In a neutral atom, the number of protons is equal to the number of ______________.
We live in the ______________ eon.
