home
Menu
Create
Random
0
0
0
thumbnail

Science General Knowledge Quiz - Hard

Can you answer these relatively tough science general knowledge questions?
Quiz by
Time123
Rate:
Last updated: May 14, 2026
You have not attempted this quiz yet.
More quiz info >>
First submittedMay 14, 2026
Times taken16
Average score45.0%
Report this quizReport
Quiz and answer stats >>
Shared scores >>
4:00
Enter answer here
0
 / 20 guessed
The quiz is paused. You have remaining.
Scoring
You scored / = %
This beats or equals % of test takers also scored 100%
The average score is
Your high score is
Your fastest time is
Keep scrolling down for answers and more stats ...
Hint
Answer
What is the process whereby the ocean is becoming more concentrated with hydrogen ions?
Acidification
E=MC^2 shows how a tiny amount of mass can create a massive amount of what?
Energy
What 9-level scale is used to measure the level of light pollution in an area?
Bortle
The Carrington Event of 1859 was the largest ___ in recorded history.
Solar Storm
Which Swedish biologist's classification system has ranks such as "Kingdom" and "Genus"?
Linnaeus
Nuclei with "___ numbers" (ex. 20 and 82) of nucleons are exceptionally stable.
Magic
What organelle in a plant cell is the primary site of photosynthesis?
Chloroplast
What is 13 equivalent to in binary?
1101
The San Francisco Earthquake had a magnitude of around 7.9 on what scale?
Richter
An example of climate ___ is planting mangroves in order to reduce the effect of flooding.
Mitigation
What percent of the air is made up of nitrogen?
78
How many valence electrons does an alkaline earth metal have?
2
Whose principle of classical mechanics describes a system's motion using energy?
Lagrange
What scale is used to measure the relative scratch resistance of minerals?
Mohs
What element is a diamond made up of?
Carbon
What is acceleration due to gravity on Earth in meters per second squared?
9.81
How many bits are in 3 bytes?
24
What programming system shares its name with a version of Minecraft?
Java
___ bonds are used to hold water molecules together.
Hydrogen
How much force in Newtons is required to accelerate a 1,000 kg car at a rate of 3 meters per second squared?
3000
Save Your Stats
Your Next Quiz
Biggest Cities in the World
How many of the world's 50 most populous urban areas can you name?
U.S. Cities With Population > 1 Million
Can you name the American cities that have ever had a population of at least one million within the city limits?
World Map Without 20 Random Countries
20 random countries have been removed from the map of the world! Can you identify them in 3 minutes?
Pin Africa on a Borderless Map
Drag the pin onto the correct country. Careful, though! Three wrong moves and the game ends.
Comments
No comments yet
Copyright H Brothers Inc, 2008–2026
Contact Us | Go To Top | View Mobile Site | Site Map