Identify the FALSE statement. Stars:
create elements by fusing the nuclei of small atoms into the nuclei of larger atoms.
have limited amounts of fuel and therefore don't exist forever.
all explode cataclysmically when they die and contribute their matter to future star generations.
that are the size of our Sun will burn for about 10 billion years.
begin as protostars, which fire up when they collapse and become denser and hotter.
all explode cataclysmically when they die and contribute their matter to future star generations.
(Only massive stars become supernovas)
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The process of an edge dislocation combining with a vacancy to circumvent an obstacle is dislocation _________.
Fill in the blank(s) with the appropriate word(s).
The density of a neutron star is
a. about the same as that of a white dwarf. b. about the same as that of the Sun. c. about the same as an atomic nucleus. d. zero.
If the hypothesis tracing the extinction of the dinosaurs to an impact is correct, the dinosaurs died off largely because
A) of global climate effects initiated by dust and smoke that entered the atmosphere after the impact. B) of injuries suffered from direct hits of pieces of the asteroid or comet. C) radiation from iridium in the asteroid caused the dinosaurs to die of cancer. D) the impact caused massive earthquakes worldwide.
Breaking a bar magnet in half will produce
A) one North and one South monopole. B) a single North magnetic monopole. C) a single South magnetic monopole. D) two bar magnets.