It really depends on the area that you live in. There is always a need for great teachers, especially those that can teach science, English or mathematics.
The main aim of teaching English is because of its global acceptability. With English communication becomes easier in almost every developed part of the world. English is also known as Global Communication Language in the corporate world.
Bear in mind that you would be competing for jobs against German and British teachers who might have done joint degrees in English and German and postgraduate teaching qualifications. It would probably be easier to find gap year teaching work in countries like China or Ghana, etc. Many of the gap year students who teach abroad are volunteers, so you need to think about whether you want to earn money or build on skills for your CV. Do you have links with any schools in Germany - have you been on a German exchange, for example? If so, you could try contacting the school and explaining that you would like some teaching experience in Germany and see if they would consider taking you on as a teaching assistant. Whatever you decide to do - viel gluck!
Way easier. However, the scope isn't nearly as good as science.
That depends on whether you want to teach Science in elementary school or college. If you want to teach it in elementary school, then you need at least a Bachelor's degree with a teaching certificate... you will have to do some student teaching along the way. If you want to teach at a college, you need a Master's degree at minimum, and it is much easier to get a job if you have a PhD. You do not need a teaching certificate (those are for teaching kids), but there might be minimum experience requirements teaching depending on the school, and so you want to make sure that you do some TA (Teaching Assistant) or other in-classroom work while you are getting your degree, just so you don't come out knowing everything about Science and nothing about teaching.
In most cases all you need is a Bachelors Degree in English and a teaching certificate. Teaching certificates are easier to get than a Bachelors Degree in Education. In response to part two, you most definitely could be an English teacher. These days you can get a teaching job without have the Education Degree at all. you can obtain an emergency credential depending on what county you are applying in, which allows you to teach for about 30 days in the same location. Best of luck. Pursuing English as a B.A. and then a credential would be more satisfying in my opinion!
easier to check a problem in science
"It helps in" just means something makes something else easier. If examples help in teaching, then examples make teaching easier. For example.
it is easier for teacher to teah
If the student does not know any English you can teach through pictures and body language. If they can speak some, you can use easier words to explain bigger concepts. While teaching in Korea there will always be a Korean/English teacher to help the students understand.
it isn't
This would depend both on the school doing the teaching and the student doing the learning. Some schools don't have one discipline or the other; many consider these two things to be identical.
it makes the teachers job alot easier at school.