1. nitrogen
a biogeochemical cycle that cycles material by fixation, assimilation, ammonification, nitrification, denitrification, and the food chain
2. phosphorus
a biogeochemical cycle that cycles material by weathering, erosion, tectonic activity, and the food chain
3. tectonic
a geochemical cycle that cycles material by mantle convection, subduction, and seafloor spreading
4. carbon
a biogeochemical cycle that cycles material by photosynthesis, respiration, and the food chain
5. hydrologic
a biogeochemical cycle that cycles material by evaporation, condensation, precipitation, and transpiration
6. rock
a geochemical cycle that cycles material by weathering, erosion, deposition, cementation, and metamorphism
Hope this answers the question. Have a nice day.
I think the answer is C! Let me know if I'm incorrect.
Answer:
B. PEi + KEi = PEf + KEf
Explanation:
It is given that
A leaf falling to the ground before hitting the ground has an initial total energy of PEi + KEi.
And the total final energy of the leaf after it hits the ground is PEf + KEf .
Since there is no air resistance, therefore the total energy is conserved.
According to the conservation of law of conservation of energy, energy is neither created nor it is destroyed. The energy is always conserved. The initial energy will be equal to the final energy.
Thus the total energy of the leaf before hitting the ground and after hitting the ground will be equal.
Thus initial energy is equal to the final energy.
Hence the answer is ---
B. PEi + KEi = PEf + KEf
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
