The answer is true
Any planets further in would tend to appear as morning or evening "stars." So from Mars the planets Earth, Venus, and Mercury would all be morning and evening "stars." Venus, of course, would be much brighter than Earth, even though Earth would generally be closer. Earth has a lower albedo.
My answer would be over 20
mars
99.8 percent of the total mass of our solar system is the Sun, and most of the rest is Jupiter. If there were 500 planets the size of Jupiter, they would STILL all fit inside the Sun.
False
Giant, or Jovian planets do not have any discernable surface as they are comprised mostly of gases and are more like a liquid inside then solid. Also, these planets are a lot larger then the inner terrestrial planets and have much more gravity. The closest thing that would resemble gravity like the earth would be the moons of the large planets. These are also much smaller then the earth and would be a fraction of the earth.
The Sun is not a planet. It is a star. The Earth has gas on it, but it is not gaseous compared to the planets defined as gaseous. So your answer would be no the Sun and the Earth are not gaseous planets.
From your perspective on Mars, it would be the planets that are "inner" planets-- Mercury, Venus and Earth.
we would die if the sun burned out. so yes it is important to earth and the other planets
Sure, Earth has caves for example. But presumably you mean deep inside. That's not really possible, at least, not in a large planet such as Earth, since such a hole would quickly collapse due to the immense pressure of the material above it.
Both planets would be destroyed, as the gravitational pull would rip off matter from both planets, and they would be ripped apart.
No, other planets are rotating at other speeds.
Any planets further in would tend to appear as morning or evening "stars." So from Mars the planets Earth, Venus, and Mercury would all be morning and evening "stars." Venus, of course, would be much brighter than Earth, even though Earth would generally be closer. Earth has a lower albedo.
Without the planets orbiting the sun all the planets would be cold and dark
My answer would be over 20
The effect on earth would be no seasons
Well the order of planets from the sun is mercury Venus earth mars Jupiter Saturn Uranus Neptune so the two closest planets from earth would be Venus and mars! Hope this helped