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physical science test 5
Terms in this set (46)
In a transverse wave, the individual particles of the medium move ______ to the direction of travel.
An example of a purely ______ wave is a sound wave.
The "big bang" refers to the origin of the _____
Information about the origin of the ______ does not come from the fact that spiral galaxies rotate.
in a "closed" universe expansion will stop and the universe will ultimately ______
the doppler shifting of radiation from the early universe has resulted in today's universe being bathed in a sea of _______
immediately after the _____ ______ the universe contained slightly more matter than antimatter.
the heavy elements in the earth were formed in ____ ____ explosions.
communications with planets outside the solar system are most likely to be achieved using ____ waves
an example of a wave that is partly _____ and partly transverse is a water wave.
when waves go from one place to another, they carry _____
the amplitude of a sound wave determines its
sound waves travel faster in
the higher the frequency of a wave, ____ ____ its wavelength
ultrasound refers to the sound whose ______ is too high for most people to hear.
protons and electrons have equal masses. True or false?
aotms and molecules are normally electrically ______
the ______ of an atom contains the most of the atom's mass.
the _____ is the unit of electric potential difference.
the watt, the unit of _____ is equal to the volt ampere.
when a current passes through a resistance, the electric energy that is lost becomes ____
a _______ attracts some substances and repels others.
a magnet does not exert a force on a stationary electric charge. True or false?
the current with which a transformer is used must be
most of the mass in the solar system is located in
is Jupiter an inner planet?
compared to the inner planets, the outer planets are denser rotate more ______ on their axes.
comets consist largely of _____ and _____
ice and dust
the tail of a comet always points away from the sun. true or false?
the Oort Cloud, which lies outside the orbit of Neptune, consists mainly of _____
the planet with the shortest year is
the planet with the longest day is
of the following planets, the one with the most satellites is
The asteroids are probably similar in composition to stony
the great red spot is an atmospheric disturbance occurring on the planet
a planet that consists largely of gasses is Neptune.
an eclipse of the ___ can only occur when the moon passes directly between the earth and the sun.
if the moon were smaller than it is, total eclipses of the sun would never occur.
the temperature of a star directly affects its color.
bc of the spectra of most stars consist of dark lines on a bright background, these stars must have ___ interiors surrounded by ____ atmospheres
the sun has an atmosphere that extends well out into the solar system.
the two chief elements in the sun are hydrogen and ___
the source of the sun's energy is nuclear
the duration of the sunspot cycle is about ___
the distance of a star from the earth can be found by comparing its luminosity and ___
the color of a relatively hot star is
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