What modifications did Kepler make to Copernicus’s model? Select two options.

1.Planetary orbits are elliptical.
2.Planets closer to the Sun move faster.
3.Planets spin in an epicycle while orbiting Earth.
4.Venus has phases due to its orbiting of the Sun.
5.Earth’s rotation causes the rising and setting of the Sun.

What is responsible for the uneven heating between the poles and the equator on any given day

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.