Little recap

What is the main reason Earth is known as the "blue planet"?

• It is the largest planet in the Solar System

• It is the third planet from the Sun

• It is covered with so much water

• It has blue vegetation

How did Earth form approximately 4.6 billion years ago?

• From volcanic eruptions

• From the condensation of gas and dust in the solar nebula

• From melting ice comets

• From oceanic crust formation

What was essential for life to begin and thrive on Earth

• Strong winds

• Formation of mountains

• Enough oxygen in the atmosphere

• resence of forests

What marked the Precambrian Era?

• Appearance of birds and mammals

• Formation of mountain ranges like the Himalayas

• Volcanic activity and emergence of the first unicellular life forms

• Development of forests and dinosaurs

When did the Phanerozoic Eon begin?

• Around 2 billion years ago

• Around 700 million years ago

• Around 3.8 billion years ago

• Around 140 million years ago

Which era is known for oil deposits, natural gas, and coal?

• Cenozoic

• Paleozoic

• Mesozoic

• Precambrian

Birds and mammalsWhat types of animals first appeared during the Paleozoic Era?

• Birds and mammals

• Reptiles and dinosaurs

• Invertebrates, fish, and amphibians

• Primates and humans

What notable events occurred in the Mesozoic Era?

• First formation of the Earth

• Development of oil and gas

• Growth of vegetation and appearance of dinosaurs

• Formation of unicellular life

What major event ended the Mesozoic Era?

• Start of glaciation

• A mass extinction

• Appearance of mammals

• Creation of oceans

What characterizes the Cenozoic Era?

• Appearance of trilobites

• Development of fish

• Formation of large mountain ranges like the Himalayas

• Creation of limestone deposits