- 17.1: What is the difference between the terms radio galaxy and active ga...
- 17.2: What statistical evidence suggests that Seyfert galaxies have suffe...
- 17.3: What evidence shows that the energy source in a double-lobed radio ...
- 17.4: How does the peculiar rotation of NGC 5128 help explain the origin ...
- 17.5: What evidence shows that quasars are ultraluminous but must be small?
- 17.6: What evidence is there that quasars occur in distant galaxies?
- 17.7: How does the unifi ed model explain the two kinds of Seyfert galaxies?
- 17.8: Why are there few quasars at low redshifts and at high redshifts bu...
- 17.9: Why did galaxies collide more often in the distant past than they d...
- 17.10: How Do We Know? How would you respond to someone who said, Oh, that...
Solutions for Chapter 17: Active Galaxies And Super Mass Black Holes
Full solutions for Foundations of Astronomy | 11th Edition
Rock or soil through which groundwater moves easily.
A solitary sand dune shaped like a crescent with its tips pointing downward.
A sequence of numbers that approximates the mean distances of the planets from the Sun.
A pipelike opening through which magma moves toward Earth’s surface. It terminates at a surface opening called a vent.
Establishing the equivalence of rocks of similar age in different areas.
A fault in which the movement is parallel to the dip of the fault.
The condition that exists when the distribution of winds within a given area results in a net horizontal outflow of air from the region. In divergence at lower levels the resulting deficit is compensated for by a downward movement of air from aloft; hence, areas of divergent winds are unfavorable to cloud formation and precipitation.
Earth system science
An interdisciplinary study that seeks to examine Earth as a system composed of numerous interacting parts or subsystems.
Igneous activity that occurs outside the crust.
Nearly spherical ice pellets having concentric layers and formed by the successive freezing of layers of water.
The area where land and sea meet and overlap; the zone between high and low tides.
The Latin name for the smooth areas of the Moon formerly thought to be seas.
A star of extremely high density composed entirely of neutrons.
Nonmetallic mineral resource
Mineral resource that is not a fuel or processed for the metals it contains.
Date that specifies the actual number of years that have passed since an event occurred.
See Axial precession.
A variable star that pulsates in size and luminosity.
The process of thrusting oceanic lithosphere into the mantle along a convergent boundary.
Describes a mineral’s toughness or its resistance to breaking or deforming.
A nourishment level in a food chain. Plant and algae producers constitute the lowest level, followed by herbivores and a series of carnivores at progressively higher levels.