Getting to know you in five minutes or less.

Use the interactive node console to explore the basics of the language. (Just type node in your shell to start it up.)

Language questions to answer

How do you declare variables and constants in a dynamically-typed language
What happens when you re-assign variables and constants values of different types
How do you define string literals, and how do you display variable values in a string

Predict the results of these expressions, then try them out

17 / 2
17 // 2
17 % 2
17 / 0

"15" + 3
"15" - 3

"bleeb" + 6
"bleeb" - 6

"5" == 5
"5" === 5

Lots of good coverage, see sections on variables, data types, conversions, operators, and comparisons
It assumes you're working in a browser, which isn't much different at this point.
Don't ever use alert, prompt, or confirm. Browsers modals are the devil. Use console.log like a decent person.

Run the node interactive console and answer the questions above (nothing to turn in here)