This document provides information about the inner planets of our solar system: Mercury, Venus, Earth, and Mars. It describes key facts about each planet such as temperature, gravity, orbital period, composition, density, presence of water, formation, and fun facts. Mercury is the closest planet to the sun with extreme temperatures and it formed from dust particles. Venus is similar in size to Earth but has a dense carbon dioxide atmosphere and no water. Earth is the third planet from the sun and has significant amounts of water. Mars is around half the size of Earth and has a thin atmosphere composed mostly of carbon dioxide.

1. By Charlotte Beasley and
Charlotte Zinda

3. • Temperature: 800 degrees Fahrenheit to -300 degrees
Fahrenheit
• Gravity:0.37 times Earth’s
• Orbit: takes less than 88 Earth days to orbit the sun
• What it is made out of: core is made of liquid metal and the
mantel is made out of silica
• Density: 13.5 kg/m3
• Water: none
• How it was made: Mercury developed from small dust
particles that formed together to make Mercury
• Fun Fact: Mercury was named after the Roman messenger
god, Mercury

4. • Temperature: up to 900 degrees Fahrenheit
• Gravity: 0.89 times Earth’s
• Orbit: takes 224.7 Earth days to orbit
• What it is made out of: core is made of iron, the mantel is
rocky, and the atmosphere is mostly carbon dioxide
• Density: 5243 kg/m3
• Water: none
• How it was made: dust particles stuck together to make
Venus
• Fun Fact: named after the Roman goddess of love

5. • Temperature:-130 degrees Fahrenheit to 140 degrees
Fahrenheit
• Gravity: 32 ft.
• Orbit: 365.2 Earth days
• What it is made out of: core is made of iron and
nickel, mantel is made of silicon, aluminum, etc., and the
crust is made of oxygen, aluminum, etc.
• Density: 5.52 g/cm³
• Water: lots of it (73%)
• How it was made: dust particles stuck together to make the
Earth!!!
• Fun Fact: you are on Earth right now

6. • Temperature: -166 degrees Fahrenheit to 32 degrees
Fahrenheit
• Gravity: 0.37 times Earth’s
• Orbit: takes 687 Earth days to orbit
• What it is made out of: core is mostly iron and sulfur, mantel
is made of silicates, and the crust is made of basalt and iron
oxide
• Density: 3.94 g/cm3
• Water: none
• How it was made: dust particles stuck together to form Mars
• Fun Fact: The Mars rovers look around Mars
• Fun Fact 2: The Mars candy company makes M&Ms

7. • . "The Rocky Planet." The Inner Planet. Solstation, 05 2. Web.
23 Apr 2012. <http://www.solstation.com/stars/4planets.htm>.
• . "Mercury Facts." Planet facts. AdChoices, n.d. Web. 23 Apr
2012. <http://www.planetfacts.net/Mercury-Facts.html>.
• . N.p., n.d. Web. 23 Apr 2012.
<http://coolcosmos.ipac.caltech.edu/cosmic_kids/AskKids/ven
us_composition.shtml>.
• Dr. David R. Williams, . "Venus/Earth Comparison." Venus fact
sheet. NASA, 201. Web. 23 Apr 2012.
<http://nssdc.gsfc.nasa.gov/planetary/factsheet/venusfact.html
>.
• Coffey, J.. "What is Mars Made Of?." Universe today.
N.p., 2008. Web. 23 Apr 2012.
<http://www.universetoday.com/14702/what-is-mars-made-
of/>.
• Green, Dan. Astronomy. New York: Kingfisher,

9. We hope you took notes (or face the wrath of Shayè).