In most cases this is interpreted as referring to the planet. The planet Earth should always be capitalized. If you are referring to soil, earth does not need to be capitalized.
Yes, "Earth" should be capitalized in this context when referring to the planet as a proper noun.
No, cardiovascular disease does not need to be capitalized unless it is at the beginning of a sentence or part of a title.
No, the word "region" does not need to be capitalized in a sentence unless it is the first word of the sentence or part of a proper noun (e.g. "Pacific Northwest region").
Yes, seasons should be capitalized when they are used as proper nouns, such as "I love the colors of Fall." If they are used more generally, they should not be capitalized, as in "I enjoy the cooler weather in fall."
No, the word "assembly" does not need to be capitalized unless it is part of a proper noun or the first word in a sentence.
No, the word "seismograph" does not need to be capitalized unless it is at the beginning of a sentence or part of a title.
No, it shouldn't be capitalized.
No, the word "region" does not need to be capitalized in a sentence unless it is the first word of the sentence or part of a proper noun (e.g. "Pacific Northwest region").
No!
No it shouldn't be capitalized.
Yes, "Middle Ages" should be capitalized when referring to that specific historical period, as it is a proper noun.
Yes, days of the week are capitalized.
Well, as a common noun it does not need to be capitalized as for it used in this sentence, " I'd like to give you a wedding at my house." but if used as a proper noun it does need to be capitalized. " I loved the Wedding."
No.
No.
Yes, "cuisine" should not be capitalized unless it is at the beginning of a sentence or part of a proper noun (e.g., "French cuisine").
No, you do not need to capitalise mile in a sentence.
No, "internships" should not be capitalized in a sentence unless it is the first word or part of a title.