yes
No, there is no need to capitalise fitness in a sentence.
No, you do not need to capitalise mile in a sentence.
You always capitalise days of the week in a sentence.
No, not unless it was beginning the sentence. Capitalize, by the way.
When you are referring to the planet Earth.At the beginning of a sentence.
yes here is an example:I live in America. You also capitalise the first letter of a sentence
Yes, the word "plaque" is not typically capitalized unless it is at the beginning of a sentence.
No, only after a full stop (period). Also do not capitalise "The" and "A" in your sentence.
No, "internships" should not be capitalized in a sentence unless it is the first word or part of a title.
There is no need to capitalise the word 'koala' in a sentence. Nor do you use the word 'bear', as koalas are not bears.
Yes it is if you capitalise and punctuate it thus: You went to the mall last week.