It has to be B!
If it’s not I’m so sorry
Answer: the earth revolves around the sun, the earth is the third planet from the sun, earth is the only planet that is orbited by one moon.
Explanation:
The sun rises in the west and sets in the east on these 2 planets: Venus and Uranus.
Answer:
The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes.
<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.
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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.
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