1. Material, especially carbohydrates, fats, and proteins, that an organism uses for energy, growth, and maintaining the processes of life. Plants, algae, and some bacteria make their own food through photosynthesis, while animals and most other organisms obtain food by consuming other organisms or organic matter.
Quick Answer. The distance from the earth to the moon is 1.25 light seconds, which is roughly 238,900 miles. Light years are reserved for dealing with massive distances in outer space. One light year is the distance that light can travel in one year.
Answer Wiki. Robert Frost has mentioned about the travel times (4.5 days and 3.5 days, from earth to moon, from moon to earth respectively). I will venture to answer your other questions. The return trip to earth requires less fuel as it is the heavier body and hence its gravity is much stronger.