There are several situations in which the ball might be raised, and there are some general statements about what to do in most. Note that this is a long list, but by no means complete or exact. Only experience will help in applying the rules or ideas behind them.
Danger:
From a free hit:
Deliberately raising the ball:
The penalty corner:
The aerial ball/overhead pass:
There is no such thing as "too high" in Field Hockey, unless you were to count the limitation on the first shot at goal during a penalty corner. In that case, an umpire will usually make their call based on simply "too high"
The only consideration on a raised ball is for whether it is dangerous, defined as 'causing legitimate evasive action'.
There are 412 dints in an official hockey ball according to the field hockey rule book.
Field hockey is a whole year sport in most countries; the offseason is usually the summer, when many players play the easier form of summer hockey (rule alterations include not being allowed to raise or hit the ball, playing on a halfsize field, less players, etc.).
Yes
Dribbling the ball
In field hockey, the ball is normally white, dimpled, made of hard plastic and around the size of a fist; most are hollow to achieve the correct weight. In ice hockey, a puck is used instead. It is normally black, smooth and made of hard solid rubber.
100 miles/hr
No. The only specifications required for a legal hockey ball are the weight and size (and sometimes colour).
yes, hockey players do play with a hard ball. It is smooth depending on the brand e.g - kookaburra
Coin toss
by hitting a ball round a pitch with a stick!
you hit the heavy ball in the goal
To play floor hockey, one would need a lightweight plastic ball, or a heavier ball. Sometimes a normal hockey stick, field hockey or bandy sticks are required.