Answer: D) The amount of air in a room never changes.
Explanation: Equilibrium is defined as the state in which the concentration of reactants and products is constant or the rate of forward direction is equal to the rate of backward direction.
a) The percentage of nitrogen gas in a room decreases steadily: the amount decreases that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
b) A blade of grass grows taller : the plant gets taller that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
c) The amount of water in a cup decreases as it evaporates: The amount of water is decreasing that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
d) The amount of air in a room never changes: the amount of air does not change as the amount of air leaving the room is same as that of the air entering the room and hence the reaction is in equilibrium.
<span>D. must rely on other means than photosynthesis.
</span>Because sunlight is inadequate at the bottom of the sea, photosynthesis cannot take place. There are no plants and food is scarce; usually decaying matter from dead organisms. Organisms in the bottom of the sea relies on chemicals from hydrothermal vents to create their own food through chemosynthesis.
Answer: Decomposition is a process in which complex organic molecules are converted into simple inorganic forms, which can be easily degraded.
Explanation:
The watermelon is a food source for decomposers. The soft fleshy part get decomposed and degraded easily but the hard thicker rind takes long. The soil decomposers like bacteria, earthworms and fungi will convert the organic matter in the watermelon into inorganic components. This way the matter is converted into a form which can be utilized by the decomposers as a source of energy and some components also improves the quality of soil.
Answer: Ground water recharge includes recharge as a natural part of the hydrologic cycle and human-induced recharge, either directly through spreading basins or injection wells, or as a consequence of human activities such as irrigation and waste disposal. Artificial recharge with excess surface water or reclaimed wastewater is increasing in many areas, thus becoming a more important component of the hydrologic cycle.
Explanation:
https://www.sciencedirect.com/topics/earth-and-planetary-sciences/groundwater-recharge
