Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

What is the World’s largest island?

  1. Australia

  2. United Kingdom

  3. Greenland

  4. South America
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Greenland is the world's largest island, covering 2,166,086 square kilometers. Australia (option A) is a continent, not an island. South America (option D) is also a continent, and the UK (option B) is much smaller. Australia is often confused as an island but is technically a continental landmass.

Multiple choice general knowledge science & technology

What does a philatelist do?

  1. Collects money

  2. Collects stamps

  3. Collects plants

  4. Saves different types of pills
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A philatelist is someone who studies and collects stamps and postal history. The term comes from the Greek words 'philos' (loving) and 'ateleia' (tax-free), referring to early postal systems. A numismatist collects money (option A), while a botanist might collect plants (option C).

Multiple choice general knowledge science & technology

What is the World’s largest island?

  1. Australia

  2. United Kingdom

  3. Greenland

  4. South America
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Greenland is the world's largest island, covering 2,166,086 square kilometers. Australia (option A) is a continent, not an island. South America (option D) is also a continent, and the UK (option B) is much smaller. Australia is often confused as an island but is technically a continental landmass.

Multiple choice general knowledge science & technology

What does a philatelist do?

  1. Collects money

  2. Collects stamps

  3. Collects plants

  4. Saves different types of pills
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A philatelist is someone who studies and collects stamps and postal history. The term comes from the Greek words 'philos' (loving) and 'ateleia' (tax-free), referring to early postal systems. A numismatist collects money (option A), while a botanist might collect plants (option C).

Multiple choice general knowledge science & technology

How fast must a rocket travel to escape Earth’s gravity?

  1. 14miles a second

  2. 7 miles a second

  3. 20 miles a second

  4. 25 miles a second
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earth's escape velocity is approximately 11.2 km/s, which converts to about 7 miles per second. This is the minimum speed needed for an object to break free from Earth's gravitational pull without additional propulsion. Higher speeds would also escape but 7 miles/s is the threshold.

Multiple choice general knowledge science & technology

Why does hydrogen peroxide bubble up when it is put on a wound?

  1. Because it is killing germs

  2. Because it always bubbles

  3. Because enzymes from broken skin cells cause it to decompose into water and oxygen

  4. Because contact with blood causes bubbles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydrogen peroxide bubbles when applied to wounds because blood and cells contain the enzyme catalase, which rapidly breaks down H2O2 into water and oxygen gas. This bubbling is the visible release of oxygen, not the germ-killing action itself. The always bubbles option is too vague, and the contact with blood explanation is incomplete.