Jawaban:

1. Yes, it is an explanation text. This is because the text aims to explain the nature, causes, and effects of tornadoes to the readers.

2. The participant of the text is tornadoes.

3. Abstract nouns found in the text include: atmosphere, formation, destruction, occurrence, and instability.

4. The text uses present tense to describe general facts about tornadoes. Example: "A tornado is a rapidly rotating column of air that is in contact with both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud."

5. Yes, there are temporal and causal conjunctions found in the text. Example of temporal conjunction: "As the sun heats the surface of the Earth, warm air rises and cool air moves in to take its place." Example of causal conjunction: "When these two air masses meet, they create instability in the atmosphere, which can lead to tornado formation."

6. Action verbs found in the text include: rotate, occur, move, take place, create, and lead.