Why are there concerns about the long-term effects of oil spills, such as chronic, delayed, or indirect impacts?
What will be an ideal response?
Many of these impacts are difficult to document and link to the spill because of the considerable time lag. For example, exposure to even tiny concentrations of the chemicals present in oil can cause harmful biological effects that usually go unnoticed. Scientific studies have shown that fish exposed to PAHs in crude oil exhibited changes in gene expression that are linked to developmental abnormalities, decreased embryo survival, and lower reproductive success that wouldn't be noticed until years later.
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Weathering and erosion play no role in the development of mountains.
Answer the following statement true (T) or false (F)
Which of the following is true of cis and trans isomers?
A) they have the same structural connectivity B) they have the same physical properties C) both a and b D) neither a nor b
____________________ refers to the long-term average of weather patterns in a particular area.
Fill in the blank(s) with the appropriate word(s).
One method of geologic dating is dendrochronology, or the science of tree ring dating. Based on what you know about tree rings, how could you determine the age of the tree? Would this be an example of relative dating or numerical dating?
What will be an ideal response?