Astronomy- Study Guide- Chapter 13 Vocabulary
A powerful pressure produced by repulsion of closely packed electrons, keeps White
Dwarf in a state of balance by pushing outward.
White Dwarf Composition, Density, and Size
mass of sun con
Astronomy- Study Guide- Chapter two Terms
A region of the sky with well-defined borders.
fiction way of thinking of things, use as a map, not al the stars are at the same distance,
directions, rotates once a day , ecliptic p
Astronomy- Study Guide- Chapter Four Terms
How far an object can go in a certain direction
A function of speed and direction.
A change in speed or direction (velocity)
Acceleration of Gravity
Acceleration of a falling object
Astronomy- Study Guide- Chapter 12 terms
A star is born when gravity causes a cloud of interstellar gas to contract to the point at
which the central object becomes hot enough to sustain nuclear fusion in its core.
Astronomy- Study Guide- Chapter Ten Vocabulary
sun generates energy by slowly contracting in size
outward push of internal gas pressure and the inward pull of gravity
Astronomy- Exam Material- Practice quiz for Chapter 6
Which of the following is NOT a characteristic of a terrestrial planet?
a. high density
b. hard surface
d. far from the Sun
2. The driving force behind plate motions is currently thought to be
Astronomy- Exam Material- Exam 1
Ultraviolet radiation is hard to observe primarily because
the Earth's atmosphere easily absorbs it at the upper atmosphere
very few objects emit at ultraviolet wavelengths
no space-based telescopes operate a
Astronomy- Exam Material- Quiz on Stars
In the equation
speed of light
, what does the E stand for?
What does being close to the sun mean to the inner planets?
It makes them bigger than the other planets
Astronomy- Exam Material- Solar System Quiz
Which is the densest planet in the solar system?
What percentage of the solar nebula's mass consisted of hydrogen and helium gases?
Astronomy- Exam Material- Quiz Early and Current Astronomers
1. Which of the following models accurately describes the view of the solar system first
developed by the Greeks?
planets are stationary
planets rotate around the sun
planets rotate aro