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Environmental Science MCQs

Environmental Science MCQs are multiple-choice questions on the natural world around us, including the atmosphere, the solar system, natural phenomena, materials and everyday applications of science. Listed under Everyday Science, they help candidates answer general science items with confidence. Every question has an instant answer, so you can learn a new fact with each attempt.

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About Environmental Science MCQs

This topic gathers practical science questions that general knowledge papers often include. You will find items on the carbon dioxide content of the atmosphere, the outermost planet, the planets visible to the naked eye, the Big Bang and the age of the universe, and the cause of the Aurora Borealis. Others explain everyday observations, such as why gaps are left between rails, why salt is spread on icy roads and how the energy value of food is measured.

Everyday Science papers reward broad, accurate general knowledge more than deep specialism. Questions like these are quick to answer if you have met them before, so wide practice is the most efficient way to prepare. Working through this set strengthens the science component of CSS, PMS and provincial commission tests, SSC and railway exams in India, and the general science section of the BCS preliminary test.

Key facts to remember

  • Carbon dioxide makes up roughly 0.04 percent of the atmosphere by volume.
  • Neptune is the outermost planet of the solar system.
  • Mercury, Venus, Mars, Jupiter and Saturn can be seen without a telescope.
  • Gaps are left between rails to allow for thermal expansion in hot weather.
  • Natural fats and oils are esters of glycerol and fatty acids.
  • Auroras occur when charged particles from the Sun interact with Earth's upper atmosphere.

Exams that include Environmental Science MCQs

Pakistan

  • CSS
  • PMS
  • PPSC
  • FPSC
  • NTS
  • ISSB

India

  • UPSC CSE
  • SSC CGL
  • RRB NTPC
  • State PSC exams
  • CDS

Bangladesh

  • BCS
  • Government job tests
  • Primary Assistant Teacher recruitment

How to prepare for Environmental Science MCQs

  1. Learn the order of the planets and their key features, as solar system questions appear in most general science papers.
  2. Connect each everyday phenomenon to its science principle, such as expansion for rail gaps and freezing point depression for road salt.
  3. Revise the composition of the atmosphere and the main greenhouse gases together in one short table.
  4. Keep fixed science facts separate from figures that change, and check changing data in a current source.

Frequently asked questions

What topics are covered in Environmental Science MCQs?

The questions cover the atmosphere and its gases, the solar system and universe, natural phenomena like auroras, everyday applications such as thermal expansion and road salt, food energy, materials like paper pulp and the composition of fats. They suit general science sections of competitive exams.

How many Environmental Science MCQs are on MCQs360?

MCQs360 has 83 Environmental Science MCQs in its Everyday Science section. Each one comes with an instant answer, and you can practise the full set free without signing up, making it a quick general science refresher.

Why is salt spread on icy roads in winter?

Salt dissolves in the thin layer of water on ice and lowers its freezing point. The resulting salt solution stays liquid at temperatures below 0 °C, so the ice melts and new ice forms less easily, making roads safer.

Which exams include Environmental Science MCQs?

These questions appear in the everyday or general science papers of CSS, PMS, PPSC and NTS in Pakistan, UPSC prelims, SSC CGL and RRB NTPC in India, and the BCS preliminary exam and government job tests in Bangladesh.

Last reviewed October 2026