Scholastic
Scholastic: Study Jams! Science: Our Solar System: Inner Planets
A slideshow and a short multiple-choice quiz on the four inner planets of our solar system, which include Mercury, Venus, Mars, and Earth.
National Earth Science Teachers Association
Windows to the Universe: Our Solar System
Our solar system is filled with a wide assortment of celestial bodies - the Sun itself, our eight planets, dwarf planets, and asteroids - and on Earth, life itself! The inner solar system is occasionally visited by comets that loop in...
Fourmilab Switzerland
John Walker: Solar System Live
This planetarium program allows you to create an accurate model of the solar system with icons or pictures of each planet. You can specify a date in the past or the future, change the viewpoint to any latitude/longitude, and even view in...
CK-12 Foundation
Ck 12: Earth Science: Inner Versus Outer Planets
[Free Registration/Login may be required to access all resource tools.] Compares the characteristics of inner and outer planets.
CK-12 Foundation
Ck 12: Earth Science: Inner Versus Outer Planets
[Free Registration/Login may be required to access all resource tools.] Compares the characteristics of inner and outer planets.
CK-12 Foundation
Ck 12: Earth Science: Mercury
[Free Registration/Login may be required to access all resource tools.] Recognize the characteristics of the planet Mercury.
CK-12 Foundation
Ck 12: Earth Science: Mercury
[Free Registration/Login may be required to access all resource tools.] Recognize the characteristics of the planet Mercury.
Other
Uppsala Astronomical Observatory: Planetary Imaging
Images of Mercury, Venus, the Moon, Mars, and Jupiter by the Swedish Vacuum Solar Telescope.
Quia
Quia: Brushing Your Teeth
This site gives you opportunities to practice putting the planets in the correct order from the sun. Press "Click here to begin" to get started.