Where does denitrification happen?

at the roots of plants

in the air

in deep soil or anoxic aquatic sediment

all of the above

One student did an experiment with salt water. The steps of the experiment are shown below. Pour half a cup of salt water into a pan. Keep the pan outside in the sun for a day. Allow all the water in the pan to evaporate.

What are the subzones for each main zone?

What are the 3 laws of Newton

If you are trying to balance a seesaw and you have a higher mass on the left, should the mass on the right be placed at a greater distance or lower distance to balance it? Why?

When you turn up the volume on a radio, which of the following change: velocity of sound, intensity, pitch, amplitude, frequency, wavelength, or loudness?

Which of the following is a vector quantity? A. 83 ounces of liquid B. 55 km/hr in a truck C. 15 seconds of travel D. 10 m/s down

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.

Is an engine-activated booster unit that reduces the effort required to apply the hydraulic brakes

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg) ?

On a very hot summer day, the rooms on the first floor of a house stay cooler than the rooms on the second. Which form of thermal energy flow causes this to occur? A) Conduction B) Convection C) Kinetic D) Radiation