Which planet rotates in a retrograde direction?
Anonymous Quiz
15%
Mars
42%
Saturn
30%
Venus
12%
Neptune
What is water photolysis?
Anonymous Quiz
6%
Breakdown of water by heat
74%
Splitting of water using light energy in photosynthesis
12%
Evaporation of water from leaves
8%
Reduction of H₂O to hydrogen
❤1
Which rock forms from the metamorphism of limestone?
Anonymous Quiz
34%
Granite
14%
Gneiss
38%
Marble
15%
Quartzite
What is an electromagnetic field?
Anonymous Quiz
21%
Gravitational force between charges
55%
A disturbance of space generated by charges and currents
4%
Surface tension of water
19%
Force field of permanent magnets
Which brain structure produces hormones?
Anonymous Quiz
8%
Hippocampus
27%
Cerebellum
63%
Pituitary gland (hypophysis)
1%
Amygdala
What is the Heisenberg uncertainty principle?
Anonymous Quiz
66%
You cannot simultaneously measure position and momentum of a particle with arbitrary precision
27%
The energy of a particle is always uncertain
5%
A particle cannot be in two states at once
3%
Light has no mass
What reagent is used to detect CO₂ in an experiment?
Anonymous Quiz
60%
Limewater (Ca(OH)₂)
27%
Hydrogen peroxide
12%
Phenolphthalein
1%
Universal indicator
What is a coral reef ecosystem?
Anonymous Quiz
11%
An underwater desert
69%
One of Earth's most biodiverse ecosystems
15%
An ecosystem devoid of vertebrates
5%
A form of mass parasitism
Which law describes the relationship between current, voltage and resistance?
Anonymous Quiz
20%
Faraday's law
69%
Ohm's law
6%
Kirchhoff's law
5%
Ampere's law
What is mitochondrial DNA?
Anonymous Quiz
18%
DNA in the cell nucleus
74%
A small circular genome in mitochondria, inherited maternally
3%
Viral DNA integrated into the genome
6%
Mitochondrial messenger RNA
❤2
What causes the aurora borealis?
Anonymous Quiz
7%
Refraction of sunlight in clouds
74%
Interaction between solar wind and Earth's magnetic field
16%
Reflection of moonlight on the atmosphere
3%
Chemical reaction between O₃ and N₂
❤2
What is alpha radioactivity?
Anonymous Quiz
3%
Emission of electrons
19%
Emission of gamma rays
72%
Emission of a helium nucleus (2 protons + 2 neutrons)
6%
Emission of neutrons
❤3
What is the pancreas's role in digestion?
Anonymous Quiz
7%
Produces hydrochloric acid
88%
Secretes digestive enzymes (lipase, amylase, protease) into the duodenum
3%
Absorbs nutrients
3%
Stores glycogen
❤2👍1
What is spectroscopy?
Anonymous Quiz
12%
Study of DNA structure
74%
Analysis of light emitted or absorbed by a substance
10%
Measurement of sound wave speed
4%
Study of gravitational tides
❤3
Which type of reaction releases heat (is exothermic)?
Anonymous Quiz
6%
Photosynthesis
16%
Water electrolysis
63%
Combustion
16%
Dissolution of NaCl in water
❤2
What is the region of space where an electron is most likely to be found called?
Anonymous Quiz
44%
Orbital
19%
Bohr shell
31%
Nucleus
6%
Energy level
❤1
Which brain part controls balance and motor coordination?
Anonymous Quiz
21%
Cerebral cortex
18%
Hypothalamus
59%
Cerebellum
3%
Medulla oblongata
❤1