The _________________ refers to the change in wavelength (and,therefore,frequency) of waves that happens if the source of the waves is moving. 
Definitions:
Synfuels
Synthetic fuels that are produced from coal, natural gas, or biomass through chemical processes, used as an alternative to traditional fossil fuels.
Chernobyl Nuclear Disaster
A catastrophic nuclear accident that occurred on April 26, 1986, at the Chernobyl Nuclear Power Plant in Ukraine, leading to widespread radioactive contamination.
Moderator
A person or substance that reduces the pace of a chemical reaction or moderates the discussion in a meeting or forum.
Nuclear Reactor
A device used to initiate and control a sustained nuclear chain reaction, primarily for the generation of electricity.
Q9: In a region with prominent perpendicular sets
Q10: An intermediate product in the transformation of
Q14: Which of the following is NOT a
Q18: If the inside of Earth was molten,which
Q19: Which mineral resources are considered renewable?<br>A) base
Q41: Which environment would most likely produce sedimentary
Q47: Large-scale volcanic eruptions can cause a drop
Q49: Which of the following minerals is softest?<br>A)
Q49: Why is preserved oceanic bedrock only composed
Q51: Important volatiles in magmas include _.<br>A) iron-