UNIT 2- PLANET EARTHUNIT 2- PLANET EARTH

Unit 2 Planet EarthUnit 2 Planet Earth

►Write in your exercise book this title:Write in your exercise book this title: UNIT 2- PLANET EARTHUNIT 2- PLANET EARTH

►Close the book. Write these questions and Close the book. Write these questions and try to answer them:try to answer them:1.1.Why is there life on Earth? (Earth´s Why is there life on Earth? (Earth´s

characteristics)characteristics)

2.2.What consequences has the movement of What consequences has the movement of rotation?rotation?

3.3.What consequences has the movement of What consequences has the movement of revolution?revolution?

4.4.What are the movements of the Moon?What are the movements of the Moon?

5.5.Which are the phases of the Moon? Draw a Which are the phases of the Moon? Draw a diagram showing them.diagram showing them.

►What is an eclipse? Can you draw an What is an eclipse? Can you draw an eclipse?eclipse?

►How many spheres (parts) make up How many spheres (parts) make up the Earth?the Earth?

►Today is……Today is……

What´s this?What´s this?►The EarthThe Earth►Our Our

planetplanet►The only The only

planet planet with life.with life.

THE EARTHTHE EARTH

► It´s the ……….. planet from the Sun.It´s the ……….. planet from the Sun.THIRD

Movements of the earthMovements of the earth

1- Rotation1- Rotation

2-Revolution2-RevolutionVideo

THE EARTHTHE EARTH

►The Earth´s satellite is the The Earth´s satellite is the ……………….……………….

MOON

Can we see both sides of the Moon? Why?

►Video sobre la Luna

►Ver video externoVer video externo

La Luna tarda lo mismo en dar una vuelta sobre sí misma (movimiento de rotación) que en dar una vuelta alrededor de la Tierra (movimiento de traslación).

Así que cada vez que gira un poco sobre su eje, también se traslada un poco alrededor nuestro, de manera que nos muestra siempre la misma cara.

►Draw how we Draw how we see the Moon see the Moon from the Earth from the Earth in the different in the different positions:positions:

Which one is bigger?Which one is bigger?►The Earth or the Moon?The Earth or the Moon?

The earth is the only planet The earth is the only planet with:with:

What makes the Earth so special??

The Earth is the only planet The Earth is the only planet withwith

►An atmosphere with oxygenAn atmosphere with oxygen►An average temperature of An average temperature of

15ºC15ºC on the Earth´s surface. on the Earth´s surface.►A water cycleA water cycle►Life as we know itLife as we know it

Which are the seasons?Which are the seasons?

►SPRINGSPRING►SUMMERSUMMER►AUTUMNAUTUMN►WINTERWINTER

What causes the seasons?What causes the seasons?► ““It’s all the school’s fault!” I heard a It’s all the school’s fault!” I heard a

young boy say. “Every time it starts to young boy say. “Every time it starts to get cold outside, I have to go back to get cold outside, I have to go back to school.”school.”

► No, it’s not the school’s fault; they can’t No, it’s not the school’s fault; they can’t change the weather. If they could, there change the weather. If they could, there would never be any snow days!would never be any snow days!

► ““Well, then maybe it’s the sun’s fault!”Well, then maybe it’s the sun’s fault!”

► You’re getting closer, but you still haven’t You’re getting closer, but you still haven’t quite got it.quite got it.

► ““Whose fault is it? Why does it have to Whose fault is it? Why does it have to get cold? I like summer the best!”get cold? I like summer the best!”

►The Earth´s axis is tilted a littleThe Earth´s axis is tilted a little

bit to one side. (an angle of 23,5º)bit to one side. (an angle of 23,5º)

The Earth revolves around the Sun.The Earth revolves around the Sun.

What causes the seasons What causes the seasons on Earth?on Earth?

What causes the seasons on What causes the seasons on Earth?Earth?

►When the sun is overhead,When the sun is overhead,

the sun’s energy is more the sun’s energy is more

concentrated. concentrated.

►When the sun shines on When the sun shines on

earth at an angle, the heat earth at an angle, the heat

is less concentrated is less concentrated

(spread over a much(spread over a much

larger area). larger area).

How does the tilt of the axis How does the tilt of the axis affect the seasons?affect the seasons?

►Notice how the top part of the earth is Notice how the top part of the earth is leaning towards the sunleaning towards the sun, which means , which means it receives more energy from the Sun. it receives more energy from the Sun.

►Here, the top part of the earth is Here, the top part of the earth is leaning away from the sunleaning away from the sun, , meaning it receives less energy from meaning it receives less energy from the sunlight. the sunlight.

Which season is it Which season is it in each picture?:in each picture?:A-In the Northern A-In the Northern

hemisphere?hemisphere?B- In the B- In the Southern Southern

hemisphere?hemisphere?

►Video explaining the seasons

►Video más extenso

Match the terms of both columns:Match the terms of both columns:1.1.La AtmósferaLa Atmósfera (The Atmosphere)(The Atmosphere)2.2.La hidrosferaLa hidrosfera (The Hydrosphere)(The Hydrosphere)3.3.La litosferaLa litosfera (The Lithosphere)(The Lithosphere)4.4.La biosferaLa biosfera (The Biosphere)(The Biosphere)

a.a.Capa del planeta donde vivimos las Capa del planeta donde vivimos las personas, animales y plantas.personas, animales y plantas.

b.b.Es el conjunto de seres vivos Es el conjunto de seres vivos (animales y plantas) que viven el (animales y plantas) que viven el planeta Tierra.planeta Tierra.

c.c.Está formada por toda el agua que se Está formada por toda el agua que se encuentra en la superficie de la Tierra.encuentra en la superficie de la Tierra.

d.d.Está formada por gases, gracias a los Está formada por gases, gracias a los cuales podemos respirar.cuales podemos respirar.

The Earth is made up of 4 The Earth is made up of 4 parts or spheresparts or spheres

1- GEOSPHERE1- GEOSPHERE

2- ATMOSPHERE2- ATMOSPHERE

3- HYDROSPHERE3- HYDROSPHERE

4- BIOSPHERE4- BIOSPHERE

What is surrounding the What is surrounding the Earth?Earth?

ATMOSPHERE

What is the atmosphere?What is the atmosphere?►Is the Is the layerlayer of air which surrounds of air which surrounds

the Earth.the Earth.

ATMOSPHERE

The main components of the The main components of the atmosphere are:atmosphere are:

►78% of :78% of :

►21% of:21% of:

►Small quantities of Argón, Carbon Small quantities of Argón, Carbon dioxidedioxide

NITROGEN

OXYGEN

What is the Geosphere?What is the Geosphere?

The solid part which includes the:

•crust

•mantle

• core:

•Outer core

•Inner core

►The upper 100 kms of the geosphere are called the: lithosphere – the most rigid part

Question 1.Question 1. Are the following Are the following answers true? (think about it.)answers true? (think about it.)

a) The atmosphere is a mixture of a) The atmosphere is a mixture of gases, mainly oxygen and nitrogen.gases, mainly oxygen and nitrogen.

b) The atmosphere has different b) The atmosphere has different layers. layers.

c) Aeroplanes fly in the lowest parts of c) Aeroplanes fly in the lowest parts of the atmosphere.the atmosphere.

d) The atmosphere is a blue layer.d) The atmosphere is a blue layer.

What is the What is the hydrosphere?hydrosphere?

►All the water All the water onon, , underunder and and above above the Earththe Earth

We can find water in the We can find water in the Earth in 3 stages:Earth in 3 stages:

►Liquid. Liquid. Where?Where? In rivers, oceans, seas, lakes….In rivers, oceans, seas, lakes….

►Solid.Solid. Where? Where? Icebergs, glaciers,…..Icebergs, glaciers,…..

►Gas. Gas. Where?Where? Atmosphere, clouds (water vapor).Atmosphere, clouds (water vapor).

What is the What is the Biosphere?Biosphere?

►All the living things which inhabit All the living things which inhabit the Earth.the Earth.

►The biosphere is a life-supporting The biosphere is a life-supporting global ecosystem, where each global ecosystem, where each living things depends on each living things depends on each other and the environment.other and the environment.

Questions you must write Questions you must write and answer:and answer:

1.1. How long takes the Earth to rotate?How long takes the Earth to rotate?

2.2. How long takes the Earth to revolve How long takes the Earth to revolve around the Sun?around the Sun?

3.3. What causes the seasons on Earth?What causes the seasons on Earth?

4.4. Write the name of the phases of Write the name of the phases of the Moon in Spanish and English.the Moon in Spanish and English.

5.5. How many “spheres” make up the How many “spheres” make up the Earth?Earth?

HomeworkHomework

►Look information about eclipses and Look information about eclipses and draw a diagram showing draw a diagram showing :: A solar eclipseA solar eclipse A lunar eclipseA lunar eclipse

►Page 26- Activities 15, 16 and 20Page 26- Activities 15, 16 and 20..