How Gravity Sculpted the Earth
What brings order on Earth is gravity. For all matter, it’s always at work. This is how gravity works for ocean tides, planet formation and escape velocity.
Articles
Biology Careers: What Do Biologists Do?
Biologist work with wildlife, marine life and vegetation. They analyze how living things, flora and fauna are composed like their structure & composition.
Human Cells vs Bacteria: Microbiota in Your Body
By 10 to 1, colonies of bacteria outnumber human cells. We rely on bacteria because they break down sugars, help digest food and protect against infections.
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.
What is the Goldilocks Zone?
Lucky for us, Earth is in the Goldilocks zone. The range where liquid water persists is 0.99 to 1.7 AU. But it doesn’t necessarily mean life or water exists.
Geology Careers: What Do Geologists Do?
Geologists study bedrock and surface rocks. They best understand how Earth’s land forms and rock change over time (physical and chemical structure).
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 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.
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
The 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.
How Much Water Is on Earth?
Water is in the ground, on the surface, in the air and in our bodies. But how much global water distribution is in glaciers, groundwater, rivers and lakes?
What is the Hydrologic Cycle? 3 Steps of the Water Cycle
The hydrologic cycle describes how water moves continuously in nature. From evaporation, condensation and surface runoff – water is always in motion.
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.
What Is the Thermosphere? [Infographic]
The thermosphere is the thickest atmospheric layer (80-550 km). It’s known for its aurora borealis, orbiting satellites and the Karman Line (edge of space).
Did Earth’s First Water Come from Comets, Volcanoes or Asteroids?
2 theories exist for the origin of water on Earth: Did comets transport water? Or was there degassing from volcanoes from rocks existing within the crust?