Planet Earth

The sections in the earth, namely:a. The core is composed of the inner core and outer coreb. The earth's crust.The crust is composed of rocks and minerals.
Inhabited earth assortment of these creatures rounded shape. Evidence that the Earth is round, among others:a. If we walk into one direction, we will go back to the same place from the opposite directionb. If we observe the ships on the high seas, the first visible is the flag or polesc. The existence of day and nightd. Based on observations of the astronauts in flight to outer space.
The revolution of the earth can be used as a basis for making the Gregorian calendar or calendar Syamsiah.Month name and age on the Roman calendar: January (31 days), February (28 days if the regular year and 29 days if leap year), March (31 days), April (30 days), in May (31 days), June (30 day), July (31 days), August (31 days), September (30 days), October (31 days), November (30 days), December (31 days).
Calendars are made based on the Islamic lunar calendar or calendar called Komariah. The name and age of the month on the Islamic calendar: Muharram (29 days), Safar (30 days), Rabi early (29 days), Rajab (29 days), Sha'ban (30 days), Ramadan (29 days), Rabi end ( 30 days), Jumadil early (29 days), Jumadil late (30 days), Shawwal (30 days), Zulkaidah (29 days), Dhul-Hijjah (hajj) (30 days).
Moon does not emit light but receives light from the sun. Reflected light from the sun to the earth so that the moon looks like a luminous. One time position moon, earth and sun lie in a straight line.Lunar eclipse occurs when the earth's position lies between the moon and the sun.Solar eclipse occurs when the position of the moon is between the earth and the sun.