- What gas has a major role in the greenhouse effect? Carbon dioxide
- The first World Environment Day was held in which year? 1973
- Which slogan was used in association with World Environment Day? Only One Earth
- What is the name of the largest ocean on Earth? Pacific
- Which of these is NOT the main metal in the Earth's core? Gold, iron, or nickel
- What percentage of the Earth is covered with water? Approximately 70%
- Which is the largest island on Earth? Greenland
- Which of these is the largest active volcano on the planet? Mauna Loa
- What is the theme for Earth Day 2022? Invest In Our Planet
- What day is Earth Day? April 22
11. What day is World Environment Day? June 5
12. What is the most common type of plastic found in the ocean? Styrofoam
13. How old is the Earth? 4.5 billion years
14. What is the hottest place on Earth? Death Valley
15. How many days does it take for the Earth to revolve around the Sun? 365
16. How much of the world's water is available for human use? <1%
17. Volcanoes can produce lightning. True
18. There are 12 times more trees on Earth than stars in the Milky Way. True
19. How many layers does Earth have? 4
20. What makes up nearly 80% of the Earth’s atmosphere? Nitrogen
21. The Great Barrier Reef is found off the coast of which country? Australia
22. Most of Earth’s breathable air comes from where? The ocean
23. Trees convert which gas into oxygen? Carbon dioxide
24. Recycling one glass bottle saves enough energy to power a light bulb for how many hours? 4
25. How many times can a piece of paper be recycled? 6
26. What item can be composted and turned into food for your garden? Eggshells, aluminum foil, or bacon grease
27. Which is the greenest form of transportation? Bike
28. How many major tectonic plates cover the Earth? 7
29. What is Earth's natural satellite called? The moon
30. How big is Earth’s radius? 6,371 km
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