WorksheetsCCA: Brown Dwarfs Quiz
Total questions: 8
Worksheet time: 4mins
What is the process that stars use to generate energy in their cores?
Fusion of hydrogen into helium
Fission of uranium
Combustion of carbon
Oxidation of iron
What prevents stars from expanding due to the heat generated by the fusion process?
Radiation pressure
Gas pressure
Magnetic field
Gravity
What is the minimum mass needed for an object to initiate hydrogen fusion in its core?
5 times the Sun’s mass
1.5 times the Sun’s mass
0.5 times the Sun’s mass
0.075 times the Sun’s mass
What is the name given to objects that are more massive than a planet but not quite massive enough to become a true star?
Super planets
Sub-stellar objects
Brown dwarfs
Low-mass stars
What is the distinguishing characteristic of brown dwarfs that helps differentiate them from regular stars?
Presence of water in their atmosphere
Fusion of deuterium in their cores
Emission of visible light in the infrared
Presence of lithium in their spectrum
What is the name of the orbiting observatory launched by NASA in 2009 to scan the entire sky looking at infrared light?
Chandra
Spitzer
Hubble
WISE
What is the color that some brown dwarfs appear to be due to the absorption of specific colors of light by molecules in their atmospheres?
Magenta
Yellow
Green
Cyan
What is the nearest star system to Earth that includes a binary pair of brown dwarfs?
Luhman 16
WISE 0855−0714
Alpha Centauri
Proxima Centauri
