What is Avogadro's number?
Anonymous Quiz
71%
6.022 × 10²³
18%
3.14 × 10⁸
5%
9.81 × 10²
6%
1.38 × 10⁻²³
What happens to light when it passes from one medium to another?
Anonymous Quiz
19%
Diffraction
61%
Refraction
14%
Polarisation
6%
Dispersion
What is an action potential in neurons?
Anonymous Quiz
8%
A static electrical potential
67%
A brief electrical impulse that travels along the neuron
15%
A change in membrane potential only during sleep
9%
The potential difference between two neurons
What is the main gas emitted by volcanoes?
Anonymous Quiz
19%
CO₂
38%
SO₂
39%
Water vapour (H₂O)
3%
H₂
What does calorimetry measure?
Anonymous Quiz
4%
Volume of a gas
83%
Heat exchanged in a chemical reaction or physical process
7%
Density of a liquid
6%
Electrical conductivity of a solution
Which part of DNA is translated into protein?
Anonymous Quiz
19%
Introns and exons both
11%
Introns only
26%
Exons (after splicing)
43%
Mitochondrial DNA
😁1
What is the region around a magnet where magnetic force acts called?
Anonymous Quiz
4%
Electric field
27%
Gravitational field
69%
Magnetic field
0%
Radiation field
What type of symbiosis is the relationship between sharks and pilot fish?
Anonymous Quiz
10%
Parasitism
37%
Mutualism
31%
Commensalism
22%
Predation
Media is too big
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What does Faraday's first law of electrolysis state?
Anonymous Quiz
5%
Current is proportional to voltage
78%
The mass deposited is proportional to the electric charge passed
10%
Resistance is inversely proportional to temperature
7%
EMF is proportional to the magnetic field
Which plant structure absorbs water and minerals from the soil?
Anonymous Quiz
5%
Leaves
5%
Stem
91%
Roots (root hairs)
0%
Flowers
❤1
What is surface tension?
Anonymous Quiz
7%
Internal pressure of a gas
85%
The force that tends to minimise the surface area of a liquid
3%
Viscosity of a fluid
5%
Friction between fluid layers
Which bond forms between amino acids in a protein?
Anonymous Quiz
11%
Ionic bond
77%
Covalent (peptide) bond
9%
Hydrogen bond
3%
Van der Waals bond
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Which organ produces red blood cells in adults?
Anonymous Quiz
13%
Liver
7%
Thymus
73%
Red bone marrow
7%
Spleen
❤2