What is the word or phrase?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

What type of tree can I carry in my hand?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Which letter of the alphabet has the most water?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

O_er_t_o_

Complete the missing letters of the given word.