By Valentina García.By Valentina García.

5ºA5ºA

1.The layers of the Earth.1.The layers of the Earth.

The Earth has got three main parts:

The atmosphere, the hydrophere and the

geosphere.

THE ATMOSPHERETHE ATMOSPHERE

• The atmosphere is a gaseous layer.

• The troposphere is closest to the Earth’s surface.It’s12km thick.We can observe meteorogical condition.

• The stratosphere is 50km thick,includes the ozone layer protects UV rays.

• The ionosphere is 400km high,reflects radio waves.

THE GEOSPHERETHE GEOSPHERE

• The geosphere is the solid part of the Earth.

• The crust it’s made of rock,includes continents,island and ocean floor.

• The mantle is under the crust,some rocks called magma.

• The core is the inner layer.It’s mostly made of iron.

THE HYDROSPHERETHE HYDROSPHERE

• The hydrosphere is the liquid part of the Earth.

• The liquid state is the oceans,seas,lakes and rivers.

• The solid state is the snow and ice.

• The gaseus state is water vapour.

2.MINERALS 2.MINERALS

• Minerals are solid bobies that from rocks.

• We can classify in three groups:

• Hardness: You cant’ scratch or break them easily.

• Lustre: Is metallic and reflec light.

• Colour: Some minerals have colour

3.ROCKS3.ROCKS

• Rocks consist of one or mare minerals.

• We can classify in three groups:

• Sedimentary: are composed of other rock

• Igneous: are formed from hot, like magma.

• Metamorphic: When rocks are very hot or when they are under lots of pressure.

4.ENERGY INSIDE THE 4.ENERGY INSIDE THE EARTH.EARTH.

• There is a lot of energy stored deep inside the Earth. This energy produces effects that we can observe on the Earth’s surface, like volcanes and earthquakes.

4.ENERGY INSIDE THE 4.ENERGY INSIDE THE EARTH.EARTH.

• There is a lot of energy stored deep inside the Earth. This energy produces effects that we can observe on the Earth’s surface, like volcanes and earthquakes.

5.GLOBES AND MAPS.5.GLOBES AND MAPS.

• Globes are three dimensional models of the Earth’s surface.

• Maps are two dimensional representatinon of the Earth’s surface.

MERIDIANSMERIDIANS

• Meridians are semicircular lines that go from the North Pole to the South Pole.

• These lines are nubered in degress.

• Meridian 0º is the Prime Meridian. It’s also called the Greenwhic Meridian

PARALLELSPARALLELS

• Parallels are circular lines that go around the Earth.These lines are numbered in degress.

• Parallels 0º is the Equator.It divides the Earth into two equal part-From east to west.