A plece of solid copper, at 10°C, is dropped into a graduated cylinder of 100°C water. Which statement BEST describes the change in heat energy in this system?
4
Both water and copper temperatures decrease
B
The temperatures of both substances remain constant
Olate temperature Cresses coober temperature decreases
water temperature decreases coger temperaturecreases

Please help

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

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is this a ?