30 Google Earth Day Quiz Questions

Welcome to this Ultimate Google Earth Day Quiz! 🌍

This MCQ quiz contains 30 multiple-choice selected questions covering earth day. These multiple-choice questions will not only test knowledge in Google earth day and environmental science but also enhance your knowledge through detailed explanations provided with each answer.

You will get the scorecard at the end of quiz which will tell about your performance. So, are you ready to test your knowledge and score 30/30? Let’s start from the question number 1.

1. What is the primary focus of Earth Day?

A. Economic growth

B. Raising awareness about environmental protection

C. Celebrating the invention of Google Earth

D. Promoting space exploration

The primary focus of Earth day is to raise awareness about environmental awareness and encourage actions to protect our planet.

2. On which date year is Earth day celebrated?

A. April 15

B. April 22

C. May 1

D. June 5

The first Earth Day was held on April 22, 1970, founded by US Senator Gaylord Nelson to raise environmental awareness.

3. Which symbol is commonly associated with Earth Day?

A. Blue globe

B. Yellow sun

C. A globe with a red ribbon

D. A green leaf or tree

Green leaves and trees symbolize nature and are often used to represent environmental conservation efforts.

4. What is the theme of Earth Day 2025?

A. Climate Action Now

B. Planet vs. Plastics

C. Our Power, Our Planet

D. Trees for the Earth

The theme for Earth Day 2025 is “Our Power, Our Planet”. This theme emphasizes the urgency of transitioning to renewable energy sources and calls on individuals, organizations, and governments to work towards tripling clean energy capacity by 2030.

5. What percentage of oxygen in the world is produced by the Amazon rainforest?

A. 1%

B. 5%

C. 10%

D. 20%

The Amazon rainforest plays a crucial role in producing approximately 20% of the oxygen on the Earth.

6. Which of the following gases is a major contributor to global warming?

A. Oxygen

B. Hydrogen

C. Carbon dioxide

D. Nitrogen

Carbon dioxide (CO₂) is a major greenhouse gas that contributes significantly to global warming by trapping heat in the atmosphere of the earth.

7. How much of the earth’s surface is covered in water?

A. 20%

B. 30%

C. 64%

D. 71%

About 71% of the Earth’s surface is covered by water, while the remaining 29% is land. This is why Earth is often called the “Blue Planet.”

8. Which of the following is a renewable source of energy?

A. Coal

B. Natural gas

C. Solar energy

D. Diesel

Renewable energy sources are those that are constantly replenished, like solar energy, wind energy, hydropower, geothermal energy, and biomass.

9. Which ocean is the largest and deepest on Earth?

A. Atlantic

B. Indian

C. Arctic

D. Pacific

The Pacific Ocean is the largest and deepest ocean, and plays a critical role in climate and marine biodiversity.

10. Which country first observed Earth Day officially?

A. United States

B. Canada

C. Japan

D. India

The first official Earth Day was held on April 22, 1970, in the Unites States, initiated by Senator Gaylord Nelson.

11. When did Google introduced its first Earth Day doodle?

A. 2003

B. 2002

C. 2001

D. 2000

Google introduced its first Earth Day Doodle in 2001.

12. How many countries have celebrated Earth Day so far?

A. 100

B. 150

C. 190

D. 192

Earth Day is observed globally in more than 190 countries. It has become one of the largest environmental movements in the world in which over 1 billion people involve each year to promot the environmental protection and awareness.

13. What is the greenhouse effect?

A. A chemical reaction that destroys the ozone layer

B. The sunlight is blocked by smog

C. A natural process that traps heat in the atmosphere of earth, and warms the planet

D. The reflection of sunlight by polar ice caps

The greenhouse effect is a natural phenomenon where certain gases like carbon dioxide, methane, and water vapor from the earth’s atmosphere trap heat from the sun, and do not escape back into space. This makes the earth warm enough.

14. Which organization is known for the “Earth Hour” campaign?

A. NASA

B. United Nations

C. Greenpeace

D. WWF (World Wide Fund for Nature)

The World Wildlife Fund (WWF) started Earth Hour, a global movement where people switch off non-essential lights for one hour to support climate action. The initiative began in Sydney, Australia, in 2007 and has grown into a worldwide event.

15. What does deforestation primarily cause?

A. Increase in rainfall

B. Reduction in soil erosion

C. Loss of wildlife habitat

D. Growth of new forests

Deforestation destroys natural habitats, leading to a decrease in biodiversity and endangered species.

16. What is the largest source of marine pollution?

A. Oil spills

B. Industrial waste

C. Agricultural runoff

D. Plastic waste

Plastic waste is a major source of marine pollution, significantly impacting sea life and ecosystems. It can cause entanglement, ingestion, leading to starvation, and the release of toxic chemicals.

17. Which country planted 50 million trees in a single day as an Earth Day initiative?

A. Chine

B. India

C. Brazil

D. Australia

India planted 50 million trees in one day as part of a record-breaking Earth Day initiative in 2016. This event occurred in the state of Uttar Pradesh.

18. What do trees absorb from the atmosphere of earth?

A. Nitrogen

B. Carbon dioxide

C. Oxygen

D. Hydrogen

Trees absorb CO₂ during photosynthesis and help reduce the greenhouse effect.

19. What is biodiversity?

A. A type of renewable energy

B. The process of breeding new plant species

C. The rich variety of living organisms on the earth

D. The number of rocks in the soil

Biodiversity, short for biological diversity, refers to the rich variety of living organisms on the earth.

20. Which of these is not biodegradable?

A. Banana peel

B. Paper bag

C. Plastic bottle

D. Cotton cloth

Biodegradable materials can be broken down by microorganisms (bacteria/fungi) into natural elements within months to years: Banana peel (2–10 weeks), Cotton T-shirt (1–5 months), and Paper bag (2–5 months). Non-biodegradable material such as plastic bottles (made from petroleum) take 450+ years to decompose, breaking into microplastics that pollute ecosystems.

21. When the astronauts see the earth from the space, it appears in which color?

A. Green

B. White

C. Blue

D. Brown

Earth appears mostly blue from space because about 71% of its surface is covered by water, which reflects blue light.

22. Most of the water on Earth is found in which of the following?

A. Ocean

B. Lake

C. River

D. Glacier

Over 97% of Earth’s water is in the oceans, making them the largest source of water on the planet.

23. When is World Environment Day celebrated every year?

A. May 6

B. March 21

C. December 1

D. June 5

World Environment Day is celebrated every year on June 5. It was established by the United Nations in 1972 to raise global awareness and encourage action for the protection of our environment. Each year, it focuses on a specific environmental theme and is hosted by a different country.

24. Which of the following animals appeared in a Google Earth Day Doodle?

A. Giant squid

B. Pangolin

C. Bald eagle

D. Arctic fox

Pangolin appeared in a Google Earth Day Doodle.

25. Which layer of the Earth’s atmosphere is closest to the surface and contains most of the weather phenomena?

A. Troposphere

B. Stratosphere

C. Mesosphere

D. Thermosphere

The troposphere is the lowest layer of the Earth’s atmosphere, extending up to about 8–15 kilometers above sea level. It is where most weather events like clouds, rain, and storms occur. It contains approximately 75% of the atmosphere’s mass.

26. What is the process of capturing and storing carbon dioxide from the atmosphere to prevent climate change called?

A. Recycling

B. Biodegradation

C. Carbon Sequestration

D. Desalination

The process of capturing and storing carbon dioxide (CO₂) from the atmosphere is called carbon sequestration. It is used as a strategy to mitigate climate change by reducing the amount of CO₂ in the air.

27. Which is the largest freshwater lake by volume on Earth?

A. Lake Superior

B. Lake Victoria

C. Lake Baikal

D. Lake Tanganyika

The largest freshwater lake by volume on Earth is Lake Baikal. It is located in southern Siberia, Russia. Lake Baikal contains approximately 20% of the world’s unfrozen surface freshwater. It is also one of the oldest lakes, estimated to be over 25 million years old.

28. What type of air pollution is caused by the burning of fossil fuels?

A. Smog

B. Light pollution

C. Noise pollution

D. Thermal pollution

Smog is a type of air pollution caused primarily by the burning of fossil fuels such as coal, oil, and gasoline. It is a mix of smoke and fog, and contains harmful pollutants like nitrogen oxides and ground-level ozone.

29. What is the largest hot desert in the world?

A. Gobi Desert

B. Arabian Desert

C. Sahara Desert

D. Kalahari Desert

The Sahara Desert, located in North Africa, is the largest hot desert in the world, which covers approximately 9.2 million square kilometers (3.6 million square miles). However, Antarctica is the largest desert overall (cold desert), while the Sahara holds the record among hot deserts.

30. What is the largest living organism on Earth?

A. Blue Whale

B. Giant Sequoia Tree

C. Great Barrier Reef

D. Honey Fungus (Armillaria ostoyae)

The Honey Fungus (Armillaria ostoyae) in Oregon, USA, is considered the largest living organism on Earth by area. It spreads across approximately 3.5 miles (5.6 kilometers) underground. It is estimated to be thousands of years old.