Answer:
A. Where people live and what cultures they create
Explanation:
Human systems, one of the six essential element of geography, can best be described as the study of where people live and what cultures they create.
Geography comes from the Greek "geo", which means earth, and "graphy" which means drawing. At the beginning geography was only the study of maps, but in time geography becomes the study of 6 essential elements:
Human System is the study of people in a certain environment that surrounds them. It observes how cultures and behaviors are defined by the location in which they live.
The world in spacial terms is referred to the study of maps and everything that is connected to the spacial contest.
Places and regions is about how people create culture in particular places called regions.
Physical system is about study of earth in a physical way like volcanoes and oceans.
Environment and society study how we interact with nature and we adapt the natural system to fit our needs.
And last but not least the use of geography teaches people how to connect all these elements into a coherent frame to study the earth and humans.
Answer:
A flood is when a bunch of water comes rushing into a place and everything is almost completely covered in water. A landslide is much the same except it is with land-not water.
Explanation:
<h2>Right answer: The density of Earth's layers</h2>
The Earth is basically made up of layers, with the Earth's crust being one of the last layers (the surface on which we stand). However, <u>this crust is not continuous, it is composed of pieces called</u><u> tectonic plates</u><u>, and the places where these plates joint together are called </u><u>faults.
</u>
When theses tectonic plates move or when sudden displacements in faults or cracks in the interior of earth’s crust occur; seismic waves are originated.
The seismic waves are the propagation of disturbances generated by small movements in a medium, <u>they propagate towards the earth's surface</u> causing earthquakes or low intensity seismic movements.
Now, <u>the speed of the waves</u> depends of the properties of the medium; which are fundamentally:
(1) the elasticity and (2) <u>the density</u> of the materials by which it is propagated.
<h2>Therefore, according to the speed of the seismic wave, the density of the Earth layer can be found.
</h2>
5 prayers a day
Salat al-fajr: dawn, before sunrise.
Salat al-zuhr: midday, after the sun passes its highest.
Salat al-'asr: the late part of the afternoon.
Salat al-maghrib: just after sunset.
Salat al-'isha: between sunset and midnight.