General science
What is the most abundant gas in earths atmosphere?
Nitrogen
what is the SI unit of pressure?
Pascal (Pa)
what is the name of the process by which a solid turns directly into a gas without passing through the liquid phase
sublimation
What is the only organ that can float in water?
lungs
I shrink as I work, yet I grow older without living.
I convert chemical energy into light and heat until I vanish.
What am I?
Candle
What constant represents the number of particles in one mole of a substance?
Avagadro’s constant
What is the world’s lowest density solid
aerogel
what natural phenomenon produces ozone into the atmosphere?
lightning
what molecule directly provides energy for most cellular processes
ATP (adenosine triphosphate)
I am born when massive stars die.
My pull is so strong that not even light escapes.
Yet my existence was predicted long before I was observed.
What am I?
Black hole
What is the smallest bone in the body called?
Stapes (in ear)
What is the smallest particle in the universe that cannot be further broken down?
quarks (in protons and neutrons)
What is the only letter that does not exist in the periodic table?
J
What are the first organ cells that form in an embryo?
heart cells
I am invisible, yet I shape the path of stars.
Galaxies spin faster because of me, though I cannot be seen or touched.
What am I?
Dark matter
What is the name of the boundary surrounding a black hole beyond which nothing can escape?
Event horizon
which law states that the pressure of a gas is inversely proportional to its volume at constant temperature?
Boyle’s law
What are the only 2 elements that exist as a liquid in room temperature?
Mercury and Bromine
what process generates the majority of ATP in aerobic respiration within mitochondria?
oxidative phosphorylation
The faster you chase me, the slower I move for you.
But for the one moving quickly, time itself bends.
What concept am I revealing?
Time dilation
What is the name of the principle that explains why airplanes can generate lift due to pressure differences above and below their wings?
bernoulli’s principle
explain the wave-particle duality phenomenon
light behaves as both a wave and a particle
what hybridisation occurs in a carbon atom forming 4 single bonds, such as in methane?
sp3 hybridisation
what are the types of sclerenchyma tissue?
fibres and sclereids
I increase in every natural process, yet the universe began with very little of me.
I measure disorder but also the direction of time itself.
What am I?
Entropy