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