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Here Are 15 Fun Ways to Celebrate Earth Day Question: Which Hollywood actors spoke to crowds in Union Square in New York City on the first Earth Day? Answer: Paul Newman and Ali MacGraw
Whether you're an Earth Day expert or hoping to learn more about our beautiful blue planet, these trivia questions will help you brush up on your planetary proficiency. Earth Day Quiz Questions
Brush up on your Earth Day knowledge with these interesting Earth Day facts and trivia about how it began and why we celebrate Mother Earth on April 22.
The world ocean is the most visible part of Earth from space. Three quarters of the planet Earth are covered by water. Most of the planet's solid surface is abyssal plain, at depths between 4,000 and 5,500 metres (13,100 and 18,000 ft) below the surface of the oceans.
Most water in Earth's atmosphere and crust comes from saline seawater, while fresh water accounts for nearly 1% of the total. The vast bulk of the water on Earth is saline or salt water, with an average salinity of 35‰ (or 3.5%, roughly equivalent to 34 grams of salts in 1 kg of seawater), though this varies slightly according to the amount of runoff received from surrounding land.
World Water Day is an annual United Nations (UN) observance day held on the 22nd of March that highlights the importance of fresh water. The day is used to advocate for the sustainable management of freshwater resources . [ 1 ]
Earth Day has been around since the '70s. Every year, over a billion people get involved with the initiatives. Here, learn surprising Earth Day facts.
The deuterium to hydrogen ratio for ocean water on Earth is known very precisely to be (1.5576 ± 0.0005) × 10 −4. [35] This value represents a mixture of all of the sources that contributed to Earth's reservoirs, and is used to identify the source or sources of Earth's water.