1. Most of Earth’s breathable air comes from where? The ocean
2. What gas has a major role in the greenhouse effect? Carbon dioxide
3. What is the most common type of plastic found in the ocean? Styrofoam
4. What day is World Environment Day? June 5
5. How old is the Earth? 4.5 billion years
6. Which slogan was used in association with World Environment Day? Only One Earth
7. What percentage of the Earth is covered with water? 70%
8. What is Earth's natural satellite called? Moon
9. Which of these is the largest active volcano on the planet? Mauna Loa
10. How much of the world's water is available for human use? <1%
11. Volcanoes can produce lightning. True
12. What day is Earth Day? April 22
13. Trees convert which gas into oxygen? Carbon dioxide
14. The Great Barrier Reef is found off the coast of which country? Australia
15. What is the hottest place on Earth? Death Valley
16. What is the name of the largest ocean on Earth? Pacific
17. How many days does it take for the Earth to revolve around the Sun? 365
18. How big is Earth’s radius? 6,371 km
19. How many major tectonic plates cover the Earth? 7
20. How many layers does Earth have? 4
21. What is the theme for Earth Day 2023? Invest In Our Planet
22. What makes up nearly 80% of the Earth’s atmosphere? Nitrogen
23. Recycling one glass bottle saves enough energy to power a light bulb for how many hours? 4
24. The first World Environment Day was held in which year? 1973
25. What item can be composted and turned into food for your garden? Eggshells
26. Which of these is NOT the main metal in the Earth's core? Gold
27. Which is the largest island on Earth? Greenland
28. How many times can a piece of paper be recycled? 6
29. There are 12 times more trees on Earth than stars in the Milky Way. True
30. Which is the greenest form of transportation? Bike
