1. I. MercuryInner Planets A. Size:Smallest planet. _____________ of the Earth. 2 moons in the solar system are larger, _______________________ _______. B. Distance from Sun:________. Closest planet to the Sun. C. Eccentricity:e = ______. Greatest in the solar system. Distance from Sun ______________. D. Surface:_________. Lots of craters and no atmosphere. E. Spin-Orbit Coupling:____ spin-orbit coupling. ____ rotations for every ___ orbits. Not synchronous (1:1) like our Moon. F. Average Temp:Day ________________ Night __________________ G. Small Elongation:________. Hard to see because it is so close to the Sun

2. II. Venus A. Size:Just slightly _______ than Earth in both mass and volume. B. Distance from Sun:________. C. Rotation:_________________ rotation. This is the only planet in the solar system that rotates __________! D. Average Temp:________________. Hottest surface in the solar system. E. Atmosphere:_____ Earth’s atmospheric pressure. Mostly ___________ runaway green house effect. ___________ clouds

3. III. Earth A. Size:________ terrestrial planet. ________ terrestrial planet (large iron/nickel core). B. Moon:____________ relative to its size. The Moon helps keep Earth’s _____________ stable at an angle of ______ with respect to our orbit around the Sun. (This tilt produces the ________.) C. Magnetism:The part of Earth’s core that is ______ produces a _____________. This deflects harmful particles from the Sun and space, _____________ on Earth. D. Life and Liquid Water:Earth is the ________________ that has ___________ on its surface and that ___________.

4. IV. Mars A. Size:______ the mass of Earth B. Distance from the Sun:________ C. Eccentricity:e = ______ (____ greater than Earth’s) ______________ (Affected by ________) D. Moons:___ ________________ E. Atmosphere:Less than ____ Earth’s atmospheric pressure Mostly _____ F. Temp:Max ______________ Min __________________ G. Largest:Volcano _____________ Canyon ______________ H. Early History:Much _________________, more __________ I. Other:Axis tilted at ______  ________ ______________ day