What is the Moho?
What will be an ideal response?
The Moho is defined by a sharp increase in seismic wave velocities that separates the Earth's crust and mantle. P-wave velocities in the crust of around 5–6 km/sec increase to uppermost mantle velocities of about 8 km/sec. Beneath the continental crust, the depth to the Moho ranges from as much as 75 km in young mountain belts to 20 km in areas undergoing extension and crustal thinning. Beneath the oceanic crust, the Moho is at a nearly constant depth of around 7 km below the ocean floor.
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The force that allows you to walk across a floor is
A. a combination of external forces. B. friction. C. simply your weight, mg. D. both your weight and the normal force.
Surface currents move water vertically which thoroughly mixes the uppermost 400 meters of the ocean's surface
Indicate whether the statement is true or false
The dissolving ability of water is related to ________.
A. the attraction between the water molecule's positive and negative charges and charges on other atoms B. the attraction between the water molecule's positive and negative charges and charges on other atoms and its ability to form hydrogen bonds with other molecules C. the attraction between the water molecule's positive and negative charges and charges on other atoms, its ability to form hydrogen bonds with other molecules, and its ability to transmit energy from water molecule to water molecule D. its ability to transmit energy from water molecule to water molecule E. its ability to form hydrogen bonds with other molecules
Biomass is a fossil fuel
Indicate whether the statement is true or false