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!

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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

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