Physical Properties and Orbit part one
What is the exact shape of Earth?
An oblate spheroid (slightly flattened at the poles, bulging at the equator).
What is the total surface area?
510 million sq km.
What are the four main layers?
Crust, mantle, outer core, and inner core.
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How much of Earth’s surface is water?
70.8%
What is the largest living structure?
Coral reefs.
How old is the Earth?
Approximately 4.54 billion years old.
What is the approximate radius?
6,400 km.
What is the boundary between the crust and mantle?
The Moho (Mohorovičić discontinuity).
Which is the largest ocean?
The Pacific Ocean.
What is the greenhouse effect?
Gases in the atmosphere trapping heat.
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What is the average distance from the Sun?
93 million miles (150 million km).
How fast does Earth orbit the Sun?
Roughly 107,000 km/h.
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What is the hardest mineral on the Mohs scale?
Diamond.
What produces 20% of Earth’s oxygen?
The Amazon rainforest.
How many languages are spoken on Earth?
Approximately 7,000.
How long does it take light from the sun to reach Earth?
About 8.25 minutes.
What causes Earth's seasons?
The 23.5* tilt of its axis
What is the most common type of igneous rock?
Basalt.
What is the driest place on Earth?
The Atacama Desert.
What is the largest mammal on Earth?
The Blue Whale.
What is the equatorial circumference?
Approximately 40,000 km
When is Earth closest to the Sun?
Perihelion, around January 3rd
What is the supercontinent surrounded by Panthalassa?
Pangaea.
1.What is the lowest layer of the atmosphere?
2.Where is the ozone layer located?
1. The troposphere.
2. The stratosphere
Which continent is the largest desert?
Antarctica (it is a cold