Subsoil: This layer has normally less organic matter than the A horizon, so its colour is mainly derived from iron oxides. Iron oxides and clay minerals accumulate as a result of weathering. In a soil, where substances move down from the topsoil, this is the layer, where they accumulate.
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Answer:
The key geographic questions ask Where is it located? Why is it there? What is the significance of the location? As students pose additional questions, they seek responses that help to organize spatial understandings: What is this place like?
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Seismic waves are sent through the earth during earthquakes, and those
energy waves are what cause the ground to shake as they travel through
it.Seismic waves travel at different speeds when they pass through
different types of material, so by studying seismograms, scientists can
learn a lot about Earth's internal structure.Body waves are seismic
waves that travel through Earth's interior, or its 'body.' Surface waves
are seismic waves that travel through Earth's surface.Surface waves are
important, but they don't provide much information about what happens
below the surface. For this, we need to study body waves so that we can
see what Earth's 'body' is like.
There are two types of body waves, called P waves and S waves. P
stands for primary waves because these waves travel the fastest and are
detected first. S stands for secondary waves because these are slower
than P waves, arriving second on the seismogram.
Answer:
Cardona concluded that the study shows how, over the more than 25,000 years that modern humans been lived in Siberia, various peoples have adapted to the region's cold weather and meaty food sources through selection on multiple genes that control several biological mechanisms.
Explanation:
Answer:
1) noun
2)government
3)China, Cuba, Laos and Vietnam
Explanation:
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