Earth in the Solar System.

1. Earth is similar to both Venus and Mars. However Mars is most similar to earth because it has almost the same size, density, mass and surface structure. A day for Mars is just over 24 hours. Its rotation axis is tilted about the same as earth.

2. Earth is drastically different to Saturn in that Saturn is a gas giant mostly made up of hydrogen and helium. Saturn has the lowest density of all planets and spins faster approx. 10 and a half hours. It has 62 moons and the only planet to have visible rings composes of ice and rock matter.

3. The earths relationship to the sun includes its distance, which is 92,955,807 miles or 149,597,870 kilo-miles. Earth orbits the sun 100,000 times, and it needs 23 hours, 56 minutes to complete one true rotation around the sun, average 24 hours. Also the effects to the sun is that it warms the seas, stirs the atmosphere, generates weather patterns, gives energy to green plants and provides oxygen and food for life.

4. Essential Question: Why is the Earth the ideal place for life in all of the Solar System?

5. Earth is divided into 4 layers. CRUST - outermost layer, made up of solid rocks, as well as silicon, oxygen and aluminum. MANTLE - made mostly of oxygen, silicon and magnesium. CORE - outer core - which is the liquid layer; and inner core - hot surface and has a high pressure.

5.1. Size

5.2. Make-up

6. Closest planet to Earth is Venus, which lies between the sun and the earth, It is 41 million kilo-miles away from the sun.

7. Special features of earth includes the liquid water which has life. It contains an atmosphere that shelters it from the rays of the sun. The most special feature are its humans, only planet to contain life.

7.1. Moons

7.2. Stars

7.3. Constellations