View
218
Download
0
Category
Tags:
Preview:
DESCRIPTION
science
Citation preview
The Earth is the third planet from the The Earth is the third planet from the SunSun. .
Its shape is spherical but flattened at the Its shape is spherical but flattened at the polespoles: North Pole at the top and South Pole : North Pole at the top and South Pole at the bottom.at the bottom.
It is the only planetIt is the only planet
that that nowadays nowadays hashas
life on it.life on it.
Most of the Earth is formed by Most of the Earth is formed by water, salt water.water, salt water.
EARTH’S MOVEMENTSEARTH’S MOVEMENTSThe Earth has got two movementsThe Earth has got two movements::
ROTATIONROTATION REVOLUTION
The Earth rotates on its axis. This movement is called the Earth’s Rotation.
axis
The Earth takes The Earth takes a day a day to rotateto rotate
A day is 24 hoursA day is 24 hours
THE EARTH’S ROTATIONTHE EARTH’S ROTATION The Earth's Rotation causes The Earth's Rotation causes dayday and and nightnight::
It is day whenIt is day when
our part of the Earthour part of the Earth
is illuminated is illuminated
by the Sun.by the Sun.
It is night when It is night when
our part of the Earthour part of the Earth
is not illuminated is not illuminated
by the Sun.by the Sun.
The Earth orbits the Sun. The Earth orbits the Sun. This movement is called the This movement is called the Earth's Earth's
Revolution.Revolution.
The form of The form of the Earth’s orbit is the Earth’s orbit is ellipticalelliptical
Earth’s orbit
Circular orbit
Elliptical orbit
The Earth takes The Earth takes a year to orbit the Suna year to orbit the Sun
A year is A year is 365 days365 days A year is divided in A year is divided in 12 months12 months
The Earth’s Revolution causes The Earth’s Revolution causes the seasonsthe seasons
The seasons are caused by the The seasons are caused by the inclination of the Earth’s axis.inclination of the Earth’s axis.
The inclination of the Earth’s axis during The inclination of the Earth’s axis during the Earth’s orbit around the Sun:the Earth’s orbit around the Sun:
One hemisphereOne hemisphereof the Earth receivesof the Earth receivesless heat and lightless heat and lightthan the other. than the other.
It’s It’s winter
The other hemisphereThe other hemispherereceives receives more lightmore lightand heat.and heat.
It’s It’s summersummer
It is hotter than in the rest of the year.It is hotter than in the rest of the year. Days are longer and night are shorterDays are longer and night are shorter
It is colder.It is colder. Days are shorter and nights are longerDays are shorter and nights are longer
Spring is the season between winter and summer. Spring is the season between winter and summer. Autumn is the season betwwen summer and Autumn is the season betwwen summer and
winter.winter. In spring and autumn temperatures are moderate.In spring and autumn temperatures are moderate. Days and nights are almost the same lengthDays and nights are almost the same length
Recommended