Ijust need with number 3! i’ll give

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

In which state was more than 100 billion tons of coal mined in 2005?

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error? the object is an asteroid, not a dwarf planet. the object is a moon, not a dwarf planet. the object is not a dwarf planet because it travels with other objects. the object is not a dwarf planet because it is round.