What is the difference between the first four planets and the last four planets?

Answer 1

The four inner planets are smaller than the four outer planets. The inner planets are made up mostly of iron and various types of rock. The outer planets are mostly hydrogen, helium, and ice. The inner planets each completely rotate in less than an Earth Day. The inner planets all rotate faster than the outer planets.

Answer 2

The first four planets (Mercury, Venus, Earth, Mars) are small and rocky. The last four, as there are only eight planets (Jupiter, Saturn, Uranus, Neptune) are large and gaseous. Pluto, the former ninth planet is small and rocky, but Pluto is considered not a planet, but a Kuiper Belt Object.

Answer 3

The inner planets are:

1. Mercury
2. Venus
3. Earth
4. Mars

They are all made mostly of rock and other solid minerals.

The outer planets are:

1. Jupiter
2. Saturn
3. Uranus
4. Neptune

They are huge compared to the inner planets. They have mainly hydrogen and helium atmospheres with a smaller core at an extreme depth pressure underneath a deep sea of hydrogen (sometimes with ammonia methane and volatile ices) that can mean actually landing on these planets with today's technology is impossible. It would be akin to trying to dig your way into the center of the sun.

Answer 4

1. The first four planets are fairly small in size.

2. The next four planets are much larger.

1. The first four have few natural satellites.

2. The next four have many natural satellites

1. The first four have rocky surfaces and metallic cores.

2. The next four are mainly gas and other fluids.

Answer 5

Mercury, Venus, Earth and Mars are known as the rocky planets -- they are mostly solid, with a small atmosphere. The other planets -- Jupiter, Saturn, Uranus an Neptune -- are the gas giants. They are much larger, and mostly gaseous or liquid, although they still have small rocky cores.

Answer 6

The first four planets are different from the others because they have different temperature, gases and masses.

Answer 7

Because the first few planets are inner planets. The rest are outer planets. Inner planets are solid and the outer ones are mostly gases.