- changing the tacticity of a polymer (does / does not) affect the degree of crystallinity
- decreasing cooling rate (increases / decreases) the glass transition temperature Tg
- in amorphous materials below ___________________ large-scale molecular motion is not present and the material has a brittle liquid structure
- Increasing the degree of crystallinity of a polymer (decreases / increases) the modulus at a temperature above the glass transition temperature but below the melting temperature.
- network modifiers are (capable / incapable) of forming an extended primary bond network
- T/F Both stratosphere and ground level ozone contribute to filtering the incident solar radiation from UV radiation
- In atmospheric circulation, the names of the 3 global circulation cells are _____ (from 0-30N&S), ______ (30-60N&S), and _______ (60-90N&S)
- decreasing the temperature of a glass forming system (increases / decreases) the viscosity of the liquid
- T/F in the ionosphere, the D layer appears during the night and disappears during the day
- in which of the following marine biomes photosyntehsis organisms absent;a. intertidal zoneb. neritic zonec. benthic zoned. abyssal zone
- below the glass transition temperature the entropy of the glass is (greater / smaller) than the entropy of the corresponding crystalline form of the material
- the prevailing surface winds associated to the three atmospheric cells from the equator poleward are: a. the trade wind, the westerlies, the polar westerliesb. the westerlies, the trade winds, the polar easterliesc. the trade winds, the westerlies, the polar easterliesd. the trade wind, the polar easterlies, the westerlies
- T/F the thermosphere is the layer of the atmosphere where scientists have observed the highest temperatures in the Earth's atmosphere
- increasing the number of side branches along a polymer backbone (increases / decreases) its ability to crystallize
- T/F the mesopause is the transitional layer of the atmosphere that separates the Mesosphere from the stratosphere
- increasing the amount of network modifiers in an oxide glass tends to (increase / decrease) the viscosity at a particular temperature
- T/F the composition of the atmosphere is homogenous in the troposphere and the stratosphere. the atmosphere is stratified in the mesosphere
- the planetary boundary is part of the _____, the ozone layer is part of the ______, and the boreal aurora happens bc of the excitation of atmospheric constituents in the ______.
- the most important radioactively active gases in the atmosphere are _____ and ____, all of which are known as greenhouse gases
- when R groups are randomly aligned on either side of a polymer chain the configuration is: ___________