Question 1. Question :
Which of the following affects the life of a star?
gravitational force
mass
temperature
fusion processes
all of these are correct
Points Received: 1 of 1
Question 2. Question :
If you were to observe a pulsar what would you see?
a blinking red glow
intermittent radio waves
a steady glow that oscillates among the stars
the sudden brightening of a star
the total eclipse of the Sun
Points Received: 1 of 1
Question 3. Question :
Mendeleev’s periodic table was organized according to rules of scientific method. Which statement below follows those rules?
The periodic table made predictions that could be tested.
Only scientists could understand the periodic table.
Information that refuted Mendeleev’s hypothesis was ignored.
Mendeleev’s listed the elements alphabetically.
The periodic table has not changed in 100 years.
Points Received: 1 of 1
Question 4. Question :
The difference in appearance of a star from other stars is a function of
the star’s gravitational force on the Earth.
how far away the star is from other stars.
the total energy emitted by the star.
the composition of the core of the star.
the star’s absolute brightness.
Points Received: 1 of 1
Question 5. Question :
An object in the universe that will not allow the escape of anything from its gravitational field is a
white dwarf
black hole
pulsar
red dwarf
neutron star
Points Received: 1 of 1
Question 6. Question :
Which type of star is produced after a large star explodes in a supernova?
a red giant
a neutron star
a proton star
a red dwarf
a white dwarf
Points Received: 1 of 1
Question 7. Question :
The total collection of photons emitted by an atom is called its
electromagnetic image
periodic position
spectrum
energy signature
stimulated emission
Points Received: 1 of 1
Question 8. Question :
Which region of the electromagnetic spectrum can easily reach a telescope on the earth’s surface?
radio waves
microwaves
ultraviolet
X-rays
gamma rays
Points Received: 1 of 1
Question 9. Question :
The Hertzsprung-Russell diagram is a graphical technique used in astronomy to compare
the surface temperature versus the energy output of a star.
the star’s luminosity versus its distance from Earth.
the absolute magnitude of the star versus the star’s relative temperature.
the distance the Sun is from the nearest red giant.
the location of possible solar systems in the Milky Way.
Points Received: 1 of 1
Question 10. Question :
The dense central portion of an atom is its
protons
neutrons
nucleus
electrons
spectrum
Points Received: 1 of 1
Question 11. Question :
A material that cannot be broken down any further without losing its chemical properties is
an ion
a molecule
an element
a photon
a laser
Points Received: 1 of 1
Question 12. Question :
The electrically neutral particle found in an atom is the
photon
neutron
electron
nucleus
Points Received: 1 of 1
Question 13. Question :
An electrically charged atom is
a proton
an ion
an electron
a neutron
a molecule
Points Received: 1 of 1