Who is Dr. Mars?
44 s. The words are spoken and shown in the picture; the player can also show them as subtitles.
Who Dr. Mars is and how his videos work. More about him on the Who is Dr. Mars? page.
What Dr. Mars says (the words of the video)
Who is Dr. Mars?
Dr. Mars is a cartoon field geologist who teaches Earth science.
In each short video, he does one real field action that shows one idea.
Then you check yourself with a question like those on the Regents.
Look at how the loops sit inside each other.
Answer: A! The top of the hill is inside the smallest loop.
The Dr. Mars site has free practice questions
with step-by-step explanations.
Dr. Mars. Free practice for the New York Earth and Space Sciences Regents.