1. An adjective (Latin: adjectivum) is a class of words that change a noun or pronoun, usually by explaining it or making it more specific. Adjectives can describe the quantity, adequacy, order, quality, or emphasis of a word.

2. -opinion

-size

-age

-shape

-colour

-an origin

-material

-Qualifier

5. Simple past tense is a tense sentence used to express events that occurred in the past and have ended in the past.

Simple past uses :

(+) subject + verb 2

(-) subject + dit not / didn't + verb 1

(?) Did +subject + verb 1

Okay, sorry I can only answer no 1,2 and 5.