Dark energy is the term used to describe ____.
a. the pressure inflating voids in the distribution of galaxies
b. radiation from antimatter and non-baryonic matter
c. a component of the cosmic microwave background radiation
d. an effect that works with gravity to decelerate the expansion of the Universe
e. an effect that works against gravity to accelerate the expansion of the Universe
Question 2
Why was the Davis experiment only able to detect one-third of the neutrinos originally predicted?
a. The number of neutrinos was too great to be held in the tank that Davis designed.
b. The neutrinos combined with other particles as they entered Earth's atmosphere.
c. The neutrinos distributed evenly among three different flavors while traveling to Earth.
d. Most of the neutrinos were absorbed by Earth's atmosphere.
e. The other two-thirds of neutrinos dissipated while traveling to Earth.