Earth Day Quiz

the Ultimate Earth Trivia Challenge

Earth Day is an annual event on April 22 to demonstrate support for environmental protection. We created this fun test on Apr 22, 2022, the 52nd Earth Day since 1970 Apr 22.

How much do you know about the planet you’re living on? We have categorized some fun facts into six parts: Chronology / Orbit / Measurement / Life / Atmosphere / Human. Take this quiz now to find out your results!

• The shape of Earth is nearly _________?

  spherical

  cubic
• The Earth's radius (the distance from Earth's center to its surface) is about _____ km.

  63,000

  6,300

  163,000

  630
• Mount Everest’s peak is the highest altitude above mean sea level at about ______ meters

  8,848

  9,677

  1,9624

  6,912
• For Earth, its polar radius is _____ its equatorial radius.

  exactly the same as

  less than

  greater than
• Earth orbits the Sun at an average distance of 149.60 _______ km.

  thousand

  million

  billion

  hundred
• Earth orbits the Sun every _________ mean solar days.

  72

  365.2564

  24

  365
• The Earth’s average orbital speed is _______.

  1,700,200 km/h

  170,200 km/h

  17,200 km/h

  1,700 km/h
• The axial tilt of Earth is approximately __________.

  2°

  5°

  16°

  23°
• Our Earth is around __________ old.

  4.5 to 4.6 billion years

  1.5 to 2.6 billion years

  4.5 to 4.6 million years

  1.5 to 2.6 million years
• The oldest fossils of living organisms are less than _______ years old.

  0.9 billion

  1.9 billion

  2.9 billion

  3.9 billion
• The continents of Earth move at the same rate as human fingernails grow.

  True

  False
• The name Earth is at least _____ years old.

  1,000

  2,000

  5,000

  10,000
• The atmosphere of Earth consists of ____% nitrogen, _____% oxygen, traces of argon, carbon monoxide, and water.

  58 / 42

  77 / 21

  95 / 5

  5 / 95
• The atmosphere of Earth is divided into 6 layers - please pick the correct order from ground to space:

  troposphere, stratosphere, mesosphere, thermosphere, exosphere, and ionosphere

  stratosphere, mesosphere, troposphere, thermosphere, exosphere, and ionosphere

  stratosphere, mesosphere, exosphere, troposphere, thermosphere, and ionosphere

  troposphere, stratosphere, mesosphere, thermosphere, ionosphere, and exosphere
• Which is the hottest layer of the atmosphere?

  stratosphere

  mesosphere

  thermosphere

  troposphere
• Which is the coldest layer of the atmosphere?

  stratosphere

  thermosphere

  troposphere

  mesosphere
• Most of our planet is covered by water, around _____.

  79%

  71%

  64%

  52%
• Life on earth is dominated by plants – they make up ____ of global biomass.

  89%

  82%

  72%

  66%
• The tiny bacteria, animals, and humans each account for ____, ____ and ____ of global biomass.

  1%, 5%, 15%

  13%, 0.4%, 0.01%

  0.05%, 0.4%, 13%

  0.05%, 13%, 0.4%
• Livestock accounts for more biomass than all humans on Earth; more than 50% greater than humans.

  True

  False
• The first truly modern humans seem to have appeared between 300,000, and 200,000 years ago in _______.

  Asia

  East Africa

  Southeast Asia

  North America
• The first human to orbit Earth was Yuri Gagarin on _________.

  10 March 1961

  12 April 1961

  25 May 1968

  11 August 1977
• It is estimated that one-eighth of Earth's surface is suitable for humans to live on.

  True

  False
• Earth’s human population passed ________ in the early 2010s.

  five billion

  six billion

  seven billion

  eight billion