3 Types of Volcanoes: Stratovolcano, Shield and Cinder Cone
The 3 types of volcanoes are stratovolcanoes, shield volcanoes and cinder cones. Based on their geography, volcanoes take different appearances.
Geology
Pacific Plate: Movement and Direction of the Pacific Tectonic Boundary
The Pacific Plate stretches all the way along the west coast of North America and reaches all the way to the east coast of the islands of Japan & Indonesia.
How Volcanoes Form Igneous Rocks
Volcanoes are the foundation for igneous rocks. When volcanoes erupt, magma and lava spews out. After cooling and solidifying, they become igneous rocks.
Human Timeline: How Long Have Humans Existed?
The earliest anatomically modern human fossil found was dated at about 200-300,000 years old in Morocco, Africa. They had modern faces and used stone tools.
Convergent Plate Boundaries: The Collision of Plate Tectonics
Convergent plate boundaries have some of the most violent catastrophes and geology on Earth. When plates smash together, it has created chains of volcanoes.
Hadean Eon: The Formation of Earth (4.6 to 4.0 billion years ago)
4,567,000,000 years ago, Earth was covered in molten lava. In the Hadean Eon, it was in its earliest stage of formation as it clumped from a cloud of dust.
African Plate and the East African Rift Zone
The African major plate contains all of Africa as well as the surrounding oceanic crust of the Atlantic Ocean. It moves at an average rate of 2.5 cm per year.
Soil Nutrients Deficiency and Replenishing
Plants mostly use water and carbon dioxide from the air to grow. But nutrients like nitrogen (N), phosphorus (P) & potassium (K) are also key ingredients.
Mass Extinctions: The 5 Biggest Dying Events in History
Earth has witnessed 5 mass extinctions where life experienced an abrupt ending. Time and time again, nature has always found a way to reshuffle the deck.
5 Soil Formation Factors: How Rocks Weather into Dirt
Soil formation is vital for food production and plant growth. Weathering is the process that breaks rock down into soils. Without it, soil wouldn’t exist.
Ice Ages: Glaciations in Geologic History
Earth has experienced 5 large ice ages. During these frigid times, hefty layers of ice smothered the planet with temperatures 10°C lower than it is today.
Human Evolution: A Timeline of Early Hominids [Infographic]
Since about 4 million years ago, humans have evolved from early hominids to modern humans. Here are 14 species examples from human evolution now extinct.
Biological Weathering: How Living Things Break Down Rocks
Biological weathering can occur from mechanical force and chemical reactions such as through plants, bacteria, fungi, burrowing animals and living organisms
History of Oxygen in Earth’s Atmosphere
In Earth’s atmosphere history, oxygen levels have changed significantly. This includes hydrogen, helium, carbon dioxide and nitrogen composition in the air.
Is Vaalbara Earth’s First Supercontinent?
The evidence that Vaalbara (2.7-3.6 billion years ago) was the first supercontinent is mainly based on their sedimentary sequences and magnetic orientation.
