What does this Rebus Picture mean?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

I am sure no one can have two things for dinner. what are they?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

If six children and two dogs were under an umbrella, how come none of them got wet?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What is the riddle which can be asked all day with a different correct answer each time.

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Can you solve this picture maths equation?