When a star becomes a singularity and has zero volume and infinite density, it is called_______________
(A) White dwarf
(B) Blue giant
(C) Wolf-Raynet star
(D) Black hole
You have discovered a new celestial body It has a thick atmosphere and it produces powerful cosmic winds and, when observed, the clouds obscure the body You have determined it is this type of star
(A) Wolf-Rayet star
(B) Red supergiant
(C) Stellar storm
(D) Pulsar
In a typical H_R diagram, stars are graphed by these two characteristics:
(A) Temperature and luminosity
(B) Luminosity and distance
(C) Distance and temperature
(D) Size and distance
A pulsar is a rapidly spinning neutron star which emits:
(A) A blinding light when it aligns with the planets
(B) Radio waves detectable from Earth
(C) A gravitational pull which attracts high energy dust particles
(D) Enough energy to power itself indefinitely
What sub_class of neutron star is known for its extremely high magnetic field
(A) Magnetar
(B) Quasar
(C) Magneto
(D) Magnetta
Water is a universal solvent for what reactions
(A) Chemical
(B) Biochemical
(C) Physical
(D) Nuclear
During a total solar eclipse the rate of Photosynthesis___________
(A) Increase
(B) Decrease
(C) Remain Constant
(D) None of them
The SI standard of time is based on_____________
(A) the daily rotation of the earth
(B) the frequency of light emitted by Kr86
(C) the yearly revolution of the earth about the sun
(D) a precision pendulum clock
(D) none of these