Answer: 1. The moon is about the same age as Earth
2. The moon lacks a sizable iron core
3. Galaxies
4. Hydrogen and helium gas
5. Venus
Explanation: 1. The Moon is about 4.53 billion years while The Earth is about 4.543 billion years. Therefore, both The Moon and The Earth are about the same age.
2. The giant impact hypothesis suggests that the Moon formed out of the debris left over from a collision between Earth and an astronomical body the size of Mars, approximately 4.5 billion years ago, in the Hadean eon. It has 7 pieces of evidence and one is that "The Moon has a relatively small iron core".
3. The solar system comprises of The Sun, Stars, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune (major planet), dwarf planets ( including Pluto), moons, asteroid, comets, meteoroids.
Mercury, Venus, Earth and Mars are the terrestrial planets ( inner planets closest to The Sun). Jupiter, Saturn, Uranus and Neptune are Jovian planets.
The solar system is rather found in of the galaxies (The Milky Way).
4. Jovian planets are made of gas or ice. Helium and hydrogen are gases and they are the main components found in them.
5. Venus is the hottest planet even though it is the second closest to the sun. The temperature is about 464ºC.
It is expected that Mercury should be the hottest due to it is the closest but it doesn't have any atmosphere, and atmosphere helps to hold and trap heat. Hence, the heat in Mercury is quickly lost into space. While Venus has a thick atmosphere and it is able to absorb all the heat from the Sun.
