Answer:
Stars do not emit sufficient light to help locate them accurately in the night sky. The revolution of Earth makes the sun and the planets move on the ecliptic with respect to the stars.
Explanation:
Rotation and revolution causes changes in star charts. When the Earth rotates, move a way from the sun and when you have rotated far enough it will be nights and you will observe stars but as the seasons changes you will see different stars because u will change to different position. The revolution of the Earth make the stars and sun move ecliptic.
The answer is the first choice:
Negative feedback reverses a change in a variable that has moved outside of its normal range, whereas positive feedback strengthens it.
Feedback loops do not only apply to blood pressure. There are many examples from body temperature regulation to child birth to your AC unit at home.
The moon has phases because of where the sun shines on it. Only yhe part wiyh light of the moon is visible. As the moon moves, the sun light hits is at different angles and creates the different shapes we call phases.
Activation of muscle contraction could be a speedy event that's initiated by electrical activity within the surface membrane and transversal (T) tubules. This can be followed by unharness of metal<span> from the inner membrane system, the sarcoplasmic reticulum.
</span>Nervous stimulation causes a depolarization<span> of the muscle membrane (sarcolemma) </span>that<span> triggers </span>the discharge<span> of </span>calcium<span> ions from the sarcoplasmic reticulum.</span>
