Answer: Energy and matter
Explanation: The earth is considered as an open system with regard to energy, and it is considered as a close system with regard to matter.
The earth as an OPEN SYSTEM for energy, energy radiate into the earth system mainly from the sun and is then radiate back to the space from the earth. This flow is been regulated by the ozone layer and earth atmosphere.
The Earth as a CLOSE SYSTEM is made up of chemical elements, what comes to mind is the periodic table. It is a list of all basic elemental materials on our planet. It is a closed box, because gravity and matter does not leave the system. The laws of thermodynamics tell us that it’s impossible to destroy matter. So the chemical elements will not leave the earth.
Answer:
Neurotransmitters
Explanation:
Let us fill in the gap in the question first;
'' NEUROTRANSMITTERS are chemical substances that are stored in very tiny sacs within the neuron's terminal buttons and involved in transmitting information across a synaptic gap to the next neuron''.
PS: The word in capital letter is the missing word to fill in the gap.
Neurotransmitters helps in transmitting message or information and they are also used to regulate mood, Concentration, rate of digestion and so on. It is released by a nerve cells and it travels down through a neighboring cell. There are different types of Neurotransmitters, few and themiat common are; dopamine, Norepinephrine, acetylcholine, endorphin, serotonin, and so on.
The person above me is correct lol
Answer:
A mountain is a landform that rises high above the surrounding terrain in a limited area