<span>The answer is Due to heating of the air by the engine exhaust. Contrails are formed when the hot exhaust of the plane engines is rapidly cooled by the cold air in the upper atmosphere. The water vapor in the engine exhaust, formed in the combustion of fuel, freezes immediately to ice crystals due to the low pressure and -36oC temperatures in the 8000 m altitude in which the planes cruise. </span>
Answer:
basophils:
Explanation:
primary phagocytic cells type that fights infection
Answer:
Generation 1: p= 0.60 q= 0.40
Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached file
Answer:
_True____ Sedimentary rocks are an important source of information about the Earth's history. __False___ Hypothesis is a well-tested and accepted view that explains scientific observations. __True___ Elements are the basic building blocks of minerals. _True____ There have been 5 mass extinction events. __True___Hydrogen and Helium are used in the process of fusion __False___The oldest rocks are found in the upper sedimentary layers. __False___Intrusive rocks are found on the surface. _False____ Nonrenewable resources can be renewed in relatively short time spans __True___There is geologic evidence that the earth has experienced many episodes of mountain building and erosion.
Explanation:
Sedimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remains.
A scientific theory is a well tested and widely accepted view that scientists agree best explains certain observable facts
