Astronomy Chapter 7 (quiz and assignment)
pressure (p) waves (wavelength) travel through __________________
liquids and solids
earth's ___________ acts as a protective shield against the dangerous, high-energy solar wind
magnetosphere
what kind of wavelength travels through solids and liquids?
pressure (p) waves
we determine the structure of the earth's core using:
seismic wave data
what kind of wavelength travels through only solids?
shear (s) waves
shear (S) waves (wavelength) travel through _________ only
solids
why is the sky blue?
the atmosphere scatters the light from the sun
the critical part of the atmosphere for protecting life on the ground from excessive ultraviolet radiation is the:
ozone layer
What layer contains the Van Allen Belt?
Magnetosphere
T/F: the continuing rise in the carbon dioxide in our atmosphere should cause our surface temperatures to rise
True
earth's magnetic field: a. is the force behind plate tectonics b. prevents charged particles in the solar wind from reaching the surface c. is a remnant of the solar nebulas magnetic field d. lines intersect the atmosphere at the equator e. is weakening the Van Allen radiation belts
b. prevents charged particles in the solar wind from reaching the surface
what is the process that physically transfers heat from a lower (hotter) to a higher (cooler) level?
convection
list the layers of the earth in order starting from the centre
core, mantle, crust, hydrosphere, atmosphere, magnetosphere
what kind of wavelength travels through only liquid?
none
which major atmospheric component is chiefly a product of life processes?
oxygen
According to Figure 7.2 in the textbook ("Earth's Atmosphere"), commercial jet airplanes flying at 10 km are in:
the troposphere