Answer:
<em>A. 6,000 years</em>
Explanation:
Original sample N = 60 g
The half life of N/2 is 3000yrs
"""""""""""""""""""N/4 is 6000yrs
N/4 ===> 15 gram
it takes 6000yrs to decrease to 15grams
There are five factors of soil formation, these are:
1) Parent Material
2) Topography
3) Biota
4) Climate
5) Time
The parent material of soil is the material that soil develops from. It is where the soil acquires its inherent characteristics or attributes that will influence the direction, timing, and nature of soil as it develops over time.
Though Topography, Time, and Climate are factors of soil development, they are rendered unimportant when parent material is not present.
Answer: B. I, II, IV, and V only
Explanation:
The motion of crustal plates has led to various changes in the earth such as the formation of mountains and continents moving to other locations. The rock cycle is also significant as well as rocks make up so much of the land surface.
Erosion has moved soil from place to place and even created iconic landmarks such as the Grand Canyon. When soil is moved from one place and put in another this is called deposition.
Answer: 1 m
Explanation:
It is simply the size of a wave, measured from one peak to the next. If one imagines a sound wave as something like a water wave, then the wavelength is simply the distance from the crest of the one wave to the next nearest crest. Thus, if the distance between two peaks is 1m, then the wavelength is 1 m.
Answer: a star with mass less than about 8 times the mass of our Sun
