They're not all the same length. Football rules require a length between 100 and 130 yards. The length at Stoke City is 110 yards, and at Manchester United it's almost 115 yards.
Lawn/grass that is mown.
grass is green and starts with g
its not grass.. its astroturf
Probably fake grass, like that they put in the football stadiums.
Golf
the apron is the area around the green, the grass in the apron is shorter than the fairway and longer than the green
Fairway.
Wild horses do require grass, though it doesn't actually have to be green, so long as the grass contains the correct amount of nutrients.
Many factors. How hard it was hit initially. What surface it rolls on, obviously a green is quicker than the rough. How long the grass is on the green, this will slow the ball down. If you are putting or playing into the grain it is slower than down grain.
Golf involves various types of surface. The area around the hole is the finest quality, the shortest and the best maintained and is known as "the green". The area from the tee-off point to the green is known as 'the fairway' and is kept short, but not as short as the green. Other parts of the course are 'managed' but not quite 'maintained'... the grass can be quite high and there can be trees and/or other plants.... this is known as 'the rough'. There is a huge amount of variety in grass types and the types used on golf courses varies by area and by preference of the management of each club.
grass and grass
Basically that if something is green and they say green as grass then Its the colour of grass. Obvs. :L