49; Number of Electrons = Number of Protons = Atomic Number
The outer core<span> of the Earth is a fluid layer about 2,300 km thick and composed of mostly iron and nickel. It that lies above Earth's solid inner </span>core<span> and below its mantle. </span>
Answer:
The correct answer would be option D, Can help make sense of difficult problems.
Explanation:
In simple words, simulation is the Model. Simulation is the imitation of some procedure or method or process or situation. We can say it deception as well. Simulation is used as a method of analysis. When there are complex situations or processes that need to be tested before launching into the general public or to be used in the scientific researches or anything, Simulation is used. Simulation imitates the situation, checks for any errors, experiments the inputs and see the outputs of the process, method, system, etc, which they have developed. So A scientist uses simulation because it can help make sense of difficult problems.
Answer:
B. Changes in the size of a mouse population after hawks, a main predator of mice, are introduced into the area where the mice live
Explanation:
A community is defined as a group of populations of two or more different species which inhabit the same area at a certain time.
Community ecology is the study of the interactions between species in communities through time on a certain place. It includes the study of the distribution, structure, demography, and interactions between populations.
