The electrons are bound to an atom by the attraction between their negative charge and the positive charge on the nucleus. This attraction is known as the _____.
A) Coulomb force
B) Doppler effect
C) Lorentz force
D) Casimir effect
Question 2The true distance of a nearby object can be calculated from the size of the apparent shift in its position relative to the background as seen from two viewing positions. That shift is called _____.
A) occultation
B) parallax
C) focal ration
D) collimation
Question 3Which of the following statements is true of coronal holes?
A) Open magnetic fields allow ionized gas to flow away as the solar wind.
B) Reconnection events prevent the release of ionized gases outward from the corona.
C) Discharge of solar materials is prevented because the region is extremely thick.
D) Magnetic field loops back into the Sun to trap the solar wind.
Question 4The process in which atoms lose or gain electrons is referred to as _____.
A) ionization
B) the Doppler effect
C) a redshift
D) collimation
Question 5__________refer to rare occasions when Venus can be seen as a tiny dot directly between Earth and the Sun.
A) Light pillars of Venus
B) Transits of Venus
C) Solar phenomena of Venus
D) Meteors of Venus
Question 6Which of the following statements is true of the analysis called helioseismology?
A) The solar interior is observed using the light that emerges from below the photosphere.
B) The cause of the 22-year cycle of sunspots is studied using the Sun's unchanged magnetic field.
C) The vibrations in the Sun are used by solar astronomers to explore its depths.
D) The unaltered electron orbits are detected when an atom is in a magnetic field.
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