What are gravitational waves?
Anonymous Quiz
12%
Sound waves in space
67%
Ripples in spacetime caused by accelerating masses
7%
Radiation from black holes
14%
Solar magnetic field oscillations
❤1
Which vitamin is essential for blood clotting?
Anonymous Quiz
8%
Vitamin A
43%
Vitamin B12
8%
Vitamin C
41%
Vitamin K
Which scale measures locally felt earthquake intensity?
Anonymous Quiz
28%
Richter
16%
Mercalli scale
41%
Seismic barometer
14%
Seismoscope
What is biodegradability?
Anonymous Quiz
8%
Mechanical recyclability
83%
Decomposition by microorganisms
6%
UV radiation resistance
3%
Tendency to evaporate
What is the lightest element in the periodic table?
Anonymous Quiz
32%
Helium
22%
Lithium
39%
Hydrogen
7%
Beryllium
Which principle explains how aeroplanes fly?
Anonymous Quiz
28%
Archimedes' principle
15%
Magnus effect
36%
Bernoulli's principle
21%
Newton's third law
❤1
Which element dominates Jupiter's atmosphere?
Anonymous Quiz
5%
Oxygen
22%
Nitrogen
51%
Hydrogen and Helium
21%
Methane and ammonia
What is the liver's role in lipid metabolism?
Anonymous Quiz
11%
Produces insulin
71%
Synthesises bile acids and lipoproteins, and metabolises fatty acids
8%
Stores triglycerides long-term
9%
Converts lipids to glucose without intermediates
What does the second law of thermodynamics state?
Anonymous Quiz
28%
Energy of an isolated system is constant
49%
Entropy of an isolated system tends to increase
12%
Every action has an equal reaction
11%
F = ma
🥰3
How are igneous rocks formed?
Anonymous Quiz
12%
Compression of sediments
53%
Metamorphism by heat and pressure
32%
Solidification of magma
3%
Precipitation of minerals in water
❤2
Why does the Moon always show the same face to Earth?
Anonymous Quiz
11%
Synodic revolution
38%
Differential rotation
49%
Synchronous rotation
3%
Libration
Which type of symbiosis benefits one organism without affecting the other?
Anonymous Quiz
23%
Mutualism
55%
Commensalism
18%
Parasitism
4%
Predation
What is the molecular formula of glucose?
Anonymous Quiz
14%
C₁₂H₂₂O₁₁
79%
C₆H₁₂O₆
3%
CH₄O
4%
C₂H₅OH