Primary project.

1. THE LOSS OF BIODIVERSITY AND
EXTINCTION

2. Extinction occurs when all the members of a species die. When
these animals disappear, they will never return to Earth.

3. ... that some animals
have become extinct?

4. Dodo birds lived in Mauricio Islands, in the
Indian Ocean.

5. Quagga (el cuaga) lived in South Africa
and became extinct in the 19th
century.

6. The mammoth was very
important for people in
Prehistory.

7. The thylacine
(tilacino) used to live
in Tasmania.
The Bali tiger became
extinct in the 20th
century.

8. Some extinctions are the
result of a natural
process. For example,
when dinosaurs became
extinct due to the falling
of a meteor 65 million
years ago. However,
there are other reasons
for species to become
extinct.

9. What are the man-made reasons that
make species disappear?
4. People
pollute the
planet
more and
more.
3. Climatic
change is
making some
habitats
disappear, so
animals do not
have a place to
live.
1. People
destroy
ecosystems.
2. People
hunt too
many
animals.

10. These are some
endangered
animals nowadays.
Let's look after
them or they will
disappear very
soon!

11. Gorillas are endangered
animals because of pollution,
hunting and ecosystem
destruction.
Polar bears are
endangered animals
because of the
climatic change that is
melting the ice in the
poles.

12. White rhinos are
endangered animals
because of hunting.
People kill them to get
their horns.
Panda bears are
endangered animals
because of pollution,
ecosystem destruction
and climatic change.

13. The lemur lives in Madagascar.
The Iberian lynx is
an endangered
animal because of
hunting and
ecosystem
destruction.

14. Some reasons that are related to
extinction are the following:
1. Pollution
2. Deforestation
3. Invasive species
4. Global warming
5. Overpopulation

15. Pollution happens when toxic and poisonous
chemicals contaminate (or pollute) the air, soil and
water.

16. Deforestation happens when we cut
down too many trees.

17. Cutting down too many trees is harmful for us for two
reasons:
Trees will not produce
the oxygen that living
things need to live.
Trees won't absorb the
carbon dioxide from the
atmosphere.
OXYGEN CARBON
DIOXIDE

18. INVASIVE SPECIES

19. There are some plant and animal species that are
invasive. They come to an ecosystem and can change it
completely. Some invasive species can kill other
species from that ecosystem.

20. American crab

21. Killer algae

22. Zebra mussel

23. Argentinian parrot

24. Alicanto:
It is a beautiful
tree but it
doesn't allow
other plants to
grow.

25. GREENHOUSE EFFECT AND GLOBAL
WARMING

26. https://www.youtube.com/watch?v=PqxMzKLYrZ4
https://www.youtube.com/watch?v=x_sJzVe9P_8
First, we have to know what the Greenhouse Effect is.
When the sun rays come to the Earth, three things
happen:

27. 1. Some rays are absorbed by the Earth.

28. 2. Some rays are
reflected to the space.

29. 3. Some rays are caught (trapped) by some gases in the
atmosphere. Thanks to these gases, the Earth is a warm
planet. This is what we call the Greenhouse Effect because
the gases act like the glass in a greenhouse.

30. However, pollution in the air (toxic and poisonous gases) and
deforestation (remember, if there are less trees; there is more
carbon dioxide in the atmosphere) make these layer of gases
thicker.

31. So, the temperature on Earth is rising. The
consequences of this are terrible. Among them, we
can see that the polar caps are melting.
GREENHOUSE EFFECT

32. Help me! Where
will I live if the ice
caps are melting?

33. OVERPOPULATION
It means that the number of people in the
planet is growing and growing. This can be
a problem because...

34. Growing population
Less food in the planet.
Less plants
due to
deforestation.
Less
plants
due to
pollution.
Less plants
due to
global
warming.
Less plants
due to
invasive
species.
Less rain
due to
global
warming.

35. As you can see, we are facing too many problems, but
what should the solution be?
This will be dealt with in the next presentation.