C1 Flashcards
name the 3 states of matter
solid, liquid, gas
what are the particles doing in a solid
they are vibrating fasten fixed positions
what are the particles doing in a liquid
they have some movement but a lot and flow to the bottom of the container
what are the particles doing in a gas
they are moving freely every where and the hotter they get the more energy they gain
how to go from solid to liquid
melting
how to go to gas from liquid
boiling
how to go gas to liquid
condensing
how to go from liquid to solid
freezing
what is an endothermic reaction
energy is taken from the surroundings usually shown by a fall in temperature
what is an exothermic reaction
energy is given out to surroundings usually shows in rise in temperature
what must be supplied to break bonds
energy
formula for photosynthesis
carbon dioxide + water => glucose + oxygen
what does oxidation mean??
the addition of oxygen to a substance in a reaction
what is the formula for complete combustion
hydrocarbon + oxygen => carbon dioxide + water
how are nitrogen oxides created
reaction between nitrogen and oxygen in the air
what greenhouse gases keep the earth warm
carbon dioxide, methane and water vapour
what is climate change including
the rise in CO2 and other greenhouse gases in the atmosphere
what are 4 common test for gases
litmus paper, glowing splint, lime water and bubbles, squeaky pop
reaction for fuel cells
hydrogen + oxygen => water
what is a fuel cell
it is a electrical cell that’s supplied with fuel and oxygen and uses energy from it to produce electricity efficiently
advantages of fuel cells
they are produced by reactions and are reliable
what is potable water mean
water that you can drink
