I'm not quite sure what you mean by which sphere, but I found that the most abundant gas on earth is nitrogen at 78%. Hope this helps
A control group of the experiment is the one in which no treatment or intervention is given. So, in your case, the pea plants in which was not subjected any of the fertilizers, will serve as a control group. This is a negative control. A positive control group is the one in which an established treatment is given, which definitely leads to the production of the desired character. So, in your case, a very good well-known fertilizer which has a positive control on the growth of the pea plant, would serve as a positive control.
Answer:
Heat
Explanation:
In almost all the energy conversion process some of energy is lost in the form of heat.
hope this helps
I do think that they close to not allow too much of either water or air from entering.
the hollow tube allows water to flow easily.
https://www.bbc.co.uk/bitesize/guides/z28g7p3/revision/1
Answer:
D) Chisel
Explanation:
chisel-A metal tool with a sharpened, beveled edge that used to cut and shape wood, stone, or metal
