Science 1 Flashcards
gun powder is made up of:
(sulphur 10%, charcoal 15%, potassium nitrate 75%)
Aspirin comes from….
comes from willow bark.
Modern napalm is a mix of ___
is a mix of benzene and polystyrene
Line on boats
plimsoll line
On boats you have the plimsoll line showing whether it’s overloaded.
Two processes you go through to get metal blade hard but not brittle
quenching makes it harder/brittle, tempering makes it less so
Benfords law is a mathematical law which says
in many types of random data the number 1 appears 30% of the time.
Amalgam = in chemistry it’s an alloy of ___ with another metal
Mercury
Especially one used for dental fillings
Brass =
copper and zinc
Bronze =
copper and tin
Rubies and Emeralds owe their colour to
chromium oxide
Stainless steel
Chromium + iron
Green copper is called…
verdigris, copper carbonate
Silver ore, aka ….
Acanthite
__ is the best conductor
Silver
To go from celcius to farenheit -
double and add 30
A beautiful stone which the Romans believed captured rays of the moon
Moonstone
The drug qat turns people’s faces ___
Green
Amorphous clayey rock that is the chief commercial ore of aluminium
Bauxite
Solar flares are dangerous for example the Carrington Event of ___
Solar flares like Carrington Event of 1859 that took out telegraph wires.
Telegraph systems all over Europe and North America failed, in some cases giving telegraph operators electric shocks. Telegraph pylons threw sparks. Some telegraph operators could continue to send and receive messages despite having disconnected their power supplies.
Chemical that causes sleep pressure
Adenezine
A million seconds is less than twelve days; a billion is
almost thirty-two years.
The most frequent 100 words account for ___ of all conversations
60% of all conversations.
___ main constituent is a solution of ~3-6% sodium hypochlorite (NaOCl)
Bleach
What do mitochondria do?
They pump –— across a membrane, creating pressure for electrons to follow.
Remember, mitochondria are the powerhouse of the cell. They pump protons across a membrane, creating pressure for electrons to follow. This forms an electrical gradient which your body exploits to create the “energy currency” ATP
____ is the study of how your behaviours and environment can cause changes that affect the way your genes work.
Epigenetics
(Maybe an infection, cancer etc) Unlike genetic changes, epigenetic changes are reversible and do not change your DNA sequence, but they can change how your body reads a DNA sequence.
acetaminophen = also known as
paracetamol
When will Sun die?
In about 5.5 billion years
Run out of hydrogen and begin expanding as it burns helium
