Uhhhhh what paragraph? Like where is it at ???
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
True, The biomass of cultivated land around equals the biomass of temperate grassland.
According to this graph, algal beds and coral reefs have the most increased net primary productivity. The net primary productivity of an estuary ecosystem is around 12 times the net prior productivity of the open ocean.
<h3>What is the biomass of a plant?</h3>
Plant biomass (W) is the weight of living plant material included above and below a unit of ground surface area at a provided point in time. Production is the biomass or weight of organic matter incorporated by a society or species per unit land area per unit time.
<h3>What is biomass presentation in crops?</h3>
Biomass is emanated from organic material such as trees, plants, and agricultural and urban waste. The prevalence of biomass produced by EU agriculture comes in the formation of biogas, and feedstocks for making biodiesel and bioethanol.
To learn more about Biomass, refer
brainly.com/question/25876556
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Answer:
Quartz is not pure in this rock.
Explanation:
When quartz shows effervescence in contact with an acid, it means that it is not in its pure state, but rather related to other substances that may be cementing the quartz. This effectiveness is caused by substances that do not react like quartz, such as calcite.
In this case, we can conclude that in relation to the calcium-rich rock shown in the question above, the calcium is not pure, but it is likely to be related to calcite, or other material that does not react to acid.
