1. How quickly does Earth rotate on its axis?
Explanation: The Earth rotates at about 1,600 kilometers per hour (or roughly 1,000 miles per hour) at the equator.
Report for correction2. How fast does Earth travel in its orbit around the Sun?
Explanation: Earth orbits the Sun at an impressive speed of about 67,000 miles per hour (107,000 kilometers per hour).
Report for correction3. What percentage of Earth's surface is covered by water?
Explanation: Approximately 71 percentage of Earth's surface is covered by water, primarily in the form of oceans.
Report for correction4. What is the largest ocean on Earth?
Explanation: The Pacific Ocean is the largest and deepest ocean on Earth.
Report for correction5. What is the process by which Earth's surface is worn away by natural forces such as wind, water, and ice?
Explanation: Erosion is the process by which Earth's surface is gradually worn away by natural forces like wind, water, and ice.
Report for correction6. What is the name of the layer of Earth's atmosphere where weather occurs?
Explanation: The troposphere is the lowest layer of Earth's atmosphere where weather phenomena, such as clouds and storms, occur.
Report for correction7. What is the term for the gradual increase in Earth's average temperature due to human activities?
Explanation: Global warming refers to the gradual increase in Earth's average temperature, primarily caused by human activities like the burning of fossil fuels.
Report for correction8. Which of the following is the largest coral reef system in the world?
Explanation: The Great Barrier Reef in Australia is the largest coral reef system in the world.
Report for correction9. Which layer of the Earth is composed of solid rock and includes the continents?
Explanation: The Earth's crust is the outermost layer, composed of solid rock and including the continents.
Report for correction10. Which layer of the Earth is responsible for generating the planet's magnetic field?
Explanation: The Earth's magnetic field is generated by the motion of molten iron and nickel in the outer core.
Report for correction11. Which layer of the Earth is composed of semi-solid, flowing rock that moves over geological time?
Explanation: The mantle is composed of semi-solid, flowing rock, and it plays a significant role in plate tectonics and Earth's geological processes.
Report for correction12. What is the study of Earth's climate and long-term weather patterns called?
Explanation: Climatology is the scientific study of Earth's climate and long-term weather patterns.
Report for correction13. What is the highest mountain on Earth?
Explanation: Mount Everest, located in the Himalayas, is the highest mountain on Earth.
Report for correction14. Which gas makes up the majority of Earth's atmosphere?
Explanation: Nitrogen makes up about 78% of Earth's atmosphere, making it the most abundant gas.
Report for correction15. Which gas is most responsible for the greenhouse effect on Earth?
Explanation: Carbon dioxide is the primary greenhouse gas responsible for trapping heat in Earth's atmosphere and contributing to the greenhouse effect.
Report for correction16. What is the name of the supercontinent that existed approximately 335 to 175 million years ago?
Explanation: Pangea was the supercontinent that existed during the late Paleozoic and early Mesozoic eras, before breaking apart into the continents we have today.
Report for correction17. What is the process by which plants and trees release water vapor into the atmosphere?
Explanation: Transpiration is the process by which plants release water vapor into the atmosphere through tiny openings in their leaves.
Report for correction18. Which country is the only one in the world without a natural river?
Explanation: Despite its vast land area, Saudi Arabia is the only country in the world that has no natural rivers.
Report for correction19. What is the largest continuous ecosystem on Earth?
Explanation: The ocean is the largest continuous ecosystem on Earth, covering about 71% of the planet's surface.
Report for correction20. Which of the following is the largest desert in the world by land area?
Explanation: The Sahara Desert in Africa is the largest desert in the world by land area.
Report for correction21. What is the largest and most powerful type of volcano?
Explanation: Stratovolcanoes, also known as composite volcanoes, are the largest and most powerful type of volcano, characterized by their steep slopes and explosive eruptions.
Report for correction22. What causes the phenomenon known as the "Northern Lights" or "Aurora Borealis"?
Explanation: The Northern Lights, or Aurora Borealis, are caused by solar flares and the interaction of charged particles from the sun with Earth's magnetic field.
Report for correction23. What is the name of the layer of Earth's atmosphere where the ozone layer is located?
Explanation: The ozone layer is located in the stratosphere, where it helps protect Earth from harmful ultraviolet (UV) radiation.
Report for correction24. Which natural disaster is characterized by the sudden shaking of the Earth's surface?
Explanation: An earthquake is characterized by the sudden shaking of the Earth's surface due to the release of energy from tectonic plate movements.
Report for correction25. What is the imaginary line that divides Earth into the Northern and Southern Hemispheres?
Explanation: The Equator is an imaginary line that divides Earth into the Northern and Southern Hemispheres, located at 0 degrees latitude.
Report for correction26. Which layer of Earth's atmosphere is the hottest, despite being farthest from the planet's surface?
Explanation: The thermosphere is the hottest layer of Earth's atmosphere, despite being farthest from the planet's surface, because it absorbs high-energy solar radiation.
Report for correction27. Which country has the world's longest coastline?
Explanation: Canada has the longest coastline in the world. Its coastline stretches over 202,080 kilometers (125,570 miles).
Report for correction28. Which planet in our solar system is known as the "Red Planet"?
Explanation: Mars is often referred to as the "Red Planet" due to its reddish appearance, caused by iron oxide (rust) on its surface.
Report for correction29. Which planet is often referred to as Earth's "sister planet" due to its similar size and composition?
Explanation: Venus is often called Earth's "sister planet" because of its similar size and composition, although it has a harsh, inhospitable environment.
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