This media is not supported in your browser
VIEW IN TELEGRAM
What if you got sucked into a black hole?
What is the frequency range audible to humans?
Anonymous Quiz
17%
1–100 Hz
47%
20–20 000 Hz
27%
100–1000 Hz
9%
20 000–200 000 Hz
Who proposed the double-helix model of DNA?
Anonymous Quiz
9%
Pauling and Corey
67%
Watson and Crick
20%
Franklin and Wilkins
4%
Avery and MacLeod
Which law states that the energy of an isolated system remains constant?
Anonymous Quiz
37%
First law of thermodynamics
45%
Second law of thermodynamics
12%
Coulomb's law
6%
Faraday's law
What is reproduction without fertilisation called?
Anonymous Quiz
13%
Sexual reproduction
62%
Asexual reproduction
17%
In vitro fertilisation
8%
Induced parthenogenesis
What is a black hole?
Anonymous Quiz
5%
A cold neutron star
73%
A region where escape velocity exceeds the speed of light
18%
An empty area between galaxies
4%
A planet with no atmosphere
❤2
What is the duplication of DNA before cell division called?
Anonymous Quiz
21%
Transcription
15%
Translation
57%
Replication
7%
Recombination
What gas makes up about 21% of Earth's atmosphere?
Anonymous Quiz
27%
Nitrogen
61%
Oxygen
5%
Argon
6%
Carbon dioxide
What is the function of white blood cells?
Anonymous Quiz
10%
Carry oxygen
78%
Defend the body against pathogens
9%
Clot the blood
3%
Produce hormones
What is the average Earth-Sun distance?
Anonymous Quiz
37%
150 million km
34%
380 000 km
17%
1 billion km
12%
57.9 million km
What does the Doppler effect describe?
Anonymous Quiz
68%
Frequency change due to relative velocity between source and observer
19%
Light refraction through a prism
8%
Sound diffraction around an obstacle
6%
Interference between coherent waves
What is an enzyme?
Anonymous Quiz
9%
A steroid hormone
82%
A protein that catalyses biochemical reactions
8%
A membrane lipid
1%
An energy nucleotide
❤1
Which of Galileo's observations contradicted the geocentric model?
Anonymous Quiz
31%
Phases of Venus and moons of Jupiter
30%
Chemical composition of the Sun
30%
Elliptical shape of orbits
9%
Expansion of the universe
What is mutualistic symbiosis?
Anonymous Quiz
22%
One organism parasitises the other
63%
Both organisms benefit
13%
One is neutral, the other benefits
3%
Competition between species
Which part of a neuron receives signals from other neurons?
Anonymous Quiz
29%
Axon
32%
Synapse
32%
Dendrite
6%
Myelin
Which law describes the force between two electric charges?
Anonymous Quiz
27%
Ohm's law
20%
Faraday's law
50%
Coulomb's law
3%
Ampere's law
What does the symbol 'K' represent in thermodynamics?
Anonymous Quiz
8%
Kilogram
71%
Kelvin
9%
Kilopascal
12%
Kilojoule
❤1