Extinction
1º slide: I’m going to talk about the species extinction and all the different causes, consequences and the species that are in danger.
2º slide: Extinction is the end of an organism or of a group of organisms, normally a species. Although a species may be "extinct in the wild," the species is not extinct until every individual has died.
3º slide: For example, this is the Dodo bird, which is extinct and his extinction is usually blamed on overhunting.
4º slide: There are many causes of the extinction and I’m going to refer the natural and humans ones.
Natural:
5º slide: The effect that climate has on extinction is very big. The bio diverse Earth can't keep up with the rapid changes in temperature and climate. The species are not used to severe weather conditions and long seasons. As more species die, it is only making it more difficult for the survivors to find food. The warmer climates we are used to are perfect for diseases and epidemics to spread.
6º slide: The changes in sea levels and currents is a result, in part, of the melting freshwater. The denser, saltier water sinks and forms the currents that marine life depends on. Ocean floor spreading and rising also affects sea level. A small rise in the ocean floor can displace a lot of water onto land that is already occupied. The gases from the volcanic activity can also be absorbed by the water making it unsuitable for some life because of the chemical composition.
7º slide: Asteroids hit the earth with extreme force. The reverberations can be felt around the world. The impact site is completely destroyed.
Cosmic Radiation is radiation being emitted from outer space and the Sun. It’s assumed that being exposed to too much cosmic radiation can mutate genes, which can potentially weaken a species' gene pool in the future. Since the radiation comes from space and the Sun, it is extremely difficult to avoid the radiation.
8º slide: For example: The Supernova remains are one source of cosmic...