1) When our Sun first reaches the Red Giant Phase, its size will be most like wh
ID: 1294819 • Letter: 1
Question
1) When our Sun first reaches the Red Giant Phase, its size will be most like which of the following?
a. Its radius will be as large as the semi-major axis of Mars' orbit
b. Its radius will be as large as half the semi-major axis of Earth's orbit
c. Its radius will be as large as the semi-major axis of Mercury's orbit
d. Its radius will be as large as half the semi-major axis of Venus's orbit
e. Its radius will be as large as the semi-major axis of Jupiter's orbit
2) For a star with a mass like our Sun's, what happens when it begins to fuse Helium in the core?
a. It becomes a neutron star
b. It blows up in supernova
c. It contracts and it's surface gets hotter
d. It enters the white dwarf stage
e. It expands and it's surface gets cooler
3) Which of the following refers to a star that is more massive than the Sun, pulsates with a period that is proportional to its luminosity, and functions as a useful distance indicator?
a. T Tauri Star
b. OB Association
c. RR Lyrae Star
d. Cepheid Variable
e. Eclipsing Binary
a. It becomes a neutron star
b. It blows up in supernova
c. It contracts and it's surface gets hotter
d. It enters the white dwarf stage
e. It expands and it's surface gets cooler
Explanation / Answer
1)
Its radius will be as large as half the semi-major axis of Earth's orbit
2)
It expands and it's surface gets cooler
3)
Cepheid Variable
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