8. Write yes or no to indicate whether the options apply to index fossils or not: the organisms lived during a particular, short time period
a)
b)
the organisms lived over a long span of time
)
c)
found in sedimentary rock
d)
found in igneous rocks
SO
e)
three criteria
f)
easily recognized
g)
not very many of the organisms existed
found on only one or two continents
h)

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.

idk about that one.

during expiration the diaphragm relaxes, which causes the diaphragm to move downwards. the contraction of diaphragm increases the space for expansion of lungs. hence, the diaphragm relaxes and positioned downward during expiration.