Earthquakes produce three types of seismic waves: primary waves, secondary waves, and surface waves. Each type moves through materials differently. In addition, the waves can reflect, or bounce, off boundaries between different layers.
Explanation: The moon changes its visual position relative to the earth during one night because the earth revolves around its axis. As the earth revolves around its axis it means that within a few hours an observer at a certain point on earth will, due to the earth's rotation, change the angle at which he sees the moon.
The fact that the moon also moves, that is, rotates around the earth, and that it takes about a month for a full rotation around the earth, is why we will see the moon in a different position in the sky at the same time next night.
Answer:
A) It has a different composition than Saturn, including a higher proportion of hydrogen compounds and rocks.
Answer:
In groundwater replenishment system in Orange County, CA, treated domestic sewer is injected into underlying aquifers using injection wells.
False
Explanation:
In the orange country's water treatment system techniques like micro filtration , and ultraviolet ( UV ) , reverse osmosis (RO) disinfection with hydrogen peroxide are used for purification . Generally at the source polluted water is first micro - filtered for the removal of small suspended particles bacteria , protozoa , and harmful virus from water . The water is then filtered via RO , which removes salts , pesticides , viruses and most organic compounds are passed in the presence of the forced water via thin plastic membrane , and in the final stage , the water is treated with hydrogen peroxide and UV light as a precautionary measure.
