التوازن البيئى: أسباب اختلال التوازن البيئى

The video explores the era when extraordinary creatures ruled the Earth, sky, and seas for over 118 million years. It describes the diversity of these creatures, from massive, train-sized beasts to small, chicken-sized predators and giant herbivores. The narrative takes us back 220 million years to a time when Earth was a single landmass known as Pangaea, shaped by climate changes. Around 215 million years ago, a mass extinction event wiped out over 90% of life, possibly due to a stellar explosion or asteroid impact. As the planet slowly recovered, reptiles emerged as dominant species.

What types of creatures once dominated the Earth according to the video?

• Only small predators

• Both large and small predators, as well as giant herbivores

• Only marine animals

• Only large herbivores

What was the Earth's landmass called 220 million years ago?

• Laurasia

• Pangaea

• Gondwana

• Atlantis

What environmental changes occurred during the era of Pangaea?

• Development of ice caps

• Creation of swamps, oceans, and unknown regions

• Expansion of rainforests

• Formation of deserts and mountains

What event led to the extinction of over 90% of life on Earth?

• A stellar explosion or asteroid impact

• A global ice age

• Volcanic eruptions

• A massive flood

Which creatures emerged as dominant after the mass extinction event?

• Insects

• Reptiles

• Birds

• Mammals