Is liquefaction man made or naturally caused?

Why you put bromophenol blue in lysis buffer? Why is the foot considered to be an organ of the body? Can a tap root plant survive if it damaged? Why are CDs bad? What type of rocks can be particles of sediments? How does the coriolis effect affect surface currents? How will you classify the volcanoes with no records of eruption? What are the major gases of Mercury? Are crystals a natural light source? How do glaciers affect people today? Can helium go through nylon? How is the Doppler Effect used to detect invisible planets? Which prevents the elodea cells from completely collapsing? When igneous rocks from a volcanic eruption cools what does it form? Why did Pluto fall in love with proserpine? Is h25 an Ionic Or Covalent? Why does it take much more energy to ionize an electron when it is in the ground state then when it is in an excited state? What determines where and how much the ground shakes? How does nature helps us? A narrow valley between hills or mountains. tipically with steep rocky walls and stream running through it?