Answer :

1. The social function of the text is to inform and explain the phenomenon of lightning and whether it can strike the same place twice.

2. Two sentences in passive voice in the text are:

• Lightning is electricity, and electricity involves tiny particles.
• Most lightning occurs within the cloud itself, but we're concerned about the lightning between clouds and the ground.

3. Two sentences in present tense from the text are:

• Can lightning strike the same place twice?
• The two opposite charges pull towards each other like the north and south ends of magnets.

4. Two conjunctions of cause and effect from the text are:

• "Usually electric charges are fairly balanced but the turbulent winds of a storm caused electric charges to separate within the cloud."
• "When a stepped leader and an upward leader meet, it makes a path for a much larger and brighter electric current to shoot up into the cloud."

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