What is an income statement, and what information does it provide? Why is earnings per share called “the bottom line”?

What is an income statement, and what information does it provide?
Why is earnings per share called “the bottom line”?
Differentiate between amortization and depreciation.
What are EBIT, operating income, and EBITDA?
Which is like a snapshot of the firm’s operations—the balance sheet
or the income statement—and which is more like a movie? Explain.