A useful model of the universe should explain two key observations: the movements of celestial bodies and the nature of the universe's composition, including elements like dark energy.
Two vital observations that a model of the universe needs to explain to be considered useful include the movement of celestial bodies and the nature of the universe's composition. For instance, as our knowledge grew, so did our understanding of the movement of celestial bodies. An early model imagined Earth as the center of the universe with everything else moving in circular orbits around it. However, these models had to be updated as more observations were made, leading to a sun-centered model fitting closer to the experimental evidence.
Secondly, the nature of the universe's composition is crucial. As hypotheses in astronomy evolve, our concept of the universe's makeup has grown to accept the idea of dark energy. While there's convincing evidence that dark energy makes up the bulk of the universe, scientists still seek a thorough understanding of what dark energy is in reality.
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Mosquitoes have r reproductive strategy while elephants have k reproductive strategy. R strategy requires that the organism reproduces exponentially while they have a short life span and little care for offspring by parents. K strategy have low reproductive rates while their organisms have long life-spans and offsprings are cared for by their parents.
Mosquitos are an example of organisms with r-reproduction strategy. This means that they tend to overproduce, have many offspring , but do not provide care for them. This happens because those organisms live in unstable, unpredictable environments, so rapid reproducing is very important. R strategy helps them produce a huge number of offspring, because at least some of them will survive to reproduce.
Elephants are an example of organisms with k-reproduction strategy, meaning that they have few offspring at a time, take care of them and have a long live span. These organisms occupy more stable environments, usually are stronger, better protected and more energy efficient. Their reproductive strategy is to grow slowly and to produce offspring with high probability of survival.
B) the revolution of the Moon around the Sun
C) the rotation of Earth
D) the rotation of the Sun
E) the rotation of the Moon
Answer:
c. the rotation of the Earth
Answer:
I think its C!
Explanation:
A sunset happens when light of the sun travels at a greater distance. Hope this helps!
Children pick up on everything around them in their life, weather you like them to or not. one the fist acts of shaking you head came from children. when they would be they would turn there head to signify something they did not want. children would also see you moving your head up and down when you do something good, or when someone is happy. this would signify something was good. they would express there emotions by these gestures. Charles Darwin wrote a book on this. I hope this helps!
Answer: It is just the way it has been throughout history.
Explanation:
B. Vacuole
C. Chloroplasts
D. Nucleus
I think its B but im not sure