1. THE EARTH
Silvia Marcela Vargas
English 5 Listening and Speaking
Universidad de Nariño
March 2014
San Juan de Pasto, Nariño Colombia

2. The Earth
Silvia Marcela Vargas Romero

3. VOCABULARY
1)Droplet /ˈdrɑˈplət; ˈdrɒplɪt/
n. a verysmallamountof liquid
2)Clump/klʌmp/
• n. asmallmass of something
such as soil
• v. toform a grouporsolid
mass

4. 3) Crust/krʌst/
n. thehardsurface of theEarth.
4) Core /kɔˈr/
n.the central part of theEarthoranyotherplanet.

5. 5) Axis /ˈæksɪs/
n.theimaginary line around
whichtheEarthturns.
6) Leapyear /liˈpjɪr/
n. a year, whichhappenseveryfourth
year, whenFebruary has 29 days
insteadof 28.

6. 7)Deity/ˈditɪ/
n. a godorgoddess.
e.g. Zeus is a deity of Greekmythology.

7. INTRODUCTION
The Earth isour home.

8. How did the Earth begin?
4.6 billion
yearsago,neither the
Earth norany of the
otherplanets in the Solar
System existed.

9. 1) A Hot Cloud of Gas
2)Billions of Droplets
4) The Earth
Earth’s Formation Process
3) A Clump
By the action of
temperature, itcondensedi
nto
Theywereslowly
put together by
gravityuntiltheyfo
rmed
It received a series of
collisions and continued on
clumping.Then,Itturnedinto

10. What is the Earth made of ?
Crust
46%Oxygen
28%Silicon
8%Aluminum
10%Others
Core
88% Iron
12% Nickel

11. How long is a day?
The Earth takes 23 hours,56 minutes
and 4 seconds to rotate on its axis.
This number is known as siderealday

12. Exactly how long is a
year?
Every year the Earth travels once around the
Sun. This journey occurs every 365.24 days.
It is this extra
0.24
daysthatcreates
the need for
leapyears.

13. Was the Earth at the centre
of the Universe?
The Earth was once believed to be the
centre of the universe.That is, people
believed the Sun and the
otherplanetswereorbitatingaround the
Earth.

14. However,in1514,Nicolaus
Copernicus,aPolishastronomer,postulatedt
hat the Sun was the centre of the universe.

15. Wheredid the name
« Earth » come from?
Most of the planets in the
solar system are
namedafterdeities of Roman
And Greekmythology.
For example,Uranus is a
Greekdeitythatrepresents
the sky.
The origin of Earth’s
nameisdifferent.

16. The name Earth comesfrom the Germanicword
« ertho » whichmeans « the soilthatwas the
source of all life ».

17. Because 70% of the planet is covered
by water.We live in the remaining 30%
solidground.
Why is the Earth called the Blue
Planet ?

18. It is a photograph of planet Earth taken in
1990 by a spacecraft named Voyager 1.
The photograph was taken from a distance
of about 1,6 billion kilometers.
Is the Eartha Pale Blue Dot ?
Carl Sagan, who was part of the Voyager 1’s
team, suggested taking this picture.

19. Earth is shown as a fraction of a pixel
against the vastness of space.
Recommended video: Pale Blue Dot - Carl Sagan
http://www.youtube.com/watch?v=n5khU_6o7lc
The
Earth

20. What is sospecial about the
Earth?
The Earth is the
onlyplanetwithtemperaturesatwhichliquidcanexist
on the surface and is the onlyplanetwith an
atmospherethatcontainsoxygen.
The Earth is the only place in the
universewherehuman life is possible.

21. Powerpoint Templates
THANK YOU

22. Questions
1) Whichisthecorrectsequence of
thefollowingsteps of
Earth’sformationprocess?
1) A cloud of gas 2) A clump
3)TheEarth 4)Billions of droplets
a)1,2,3,4
b)1,4,2,3
c)1,2,4,3
2) Whatisthemaincomponent of Earth’score?
a) Nickel
b) Silicon
c) Iron

23. 3) Howlongis a siderealday ?
a) 23 hours 56 minutes 4 seconds
b) 23 hours 55 minutes 4 seconds
c) 22 hours 56 minutes 4 seconds
4) NicolausCopernicuspostulatedthat:
a) TheEarthwasthe center of theuniverse.
b) TheSunwasthe center of theuniverse.
c) TheSunwasthe center of the Solar System.
5) WhydoesFebraury 29th exist?
a) BecausetheEarthdoesnotorbittheSunin a wholenumberof
days.
b) BecausetheEarthdoesnotrotateonits axis in a wholenumber
of days.
c) BecausetheEarthmakes a journey of 365
daysaroundtheSun once a year.