Videos

Short videos in which Dr. Mars, a geologist drawn with a hat, a laptop and a rock hammer, explains one idea that Regents questions often ask about. Each one asks a question, works through it, and ends with a question for you. The words are spoken and shown on screen.

For the Earth and Space Sciences Regents

• Why Earth has seasons1 min 39 s
• Orbits, eccentricity and gravity1 min 49 s
• Big Bang and the expanding universe1 min 37 s
• Planetary wind belts1 min 58 s
• Surface ocean currents1 min 41 s
• Reading a climate graph1 min 36 s
• How carbon moves1 min 41 s
• Weathering, erosion and deposition1 min 34 s
• Natural hazards: a town below a volcano1 min 45 s

For the older Earth Science Regents

These two use the 2011 Reference Tables.

• How to read a topographic map1 min 22 s
• Finding an earthquake epicenter1 min 40 s