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Density
P = m/v
mass = the amount of matter something is made of
volume = the amount of space an object occupies measured in cm3
put a certain amount of water in a cylinder
put the object into the cylinder
measure how much the water went up by
minus the change of water by the beginning amount of water
this is the volume
measure the mass of the object
divide the mass by the volume
when the mass is doubled the density is doubled
when the volume is doubled the density halves
when the mass is doubled and the density halves the volume is quadrupled
Food webs
if one animal at the bottom of the food web becomes extinct, everything will change
consumers eat the producers
secondary consumers eat the consumers
producers get their food from the sunlight
tertiary consumers eat the secondary consumers and so on
i an animal has many predators then they will be more likely to go extinct
Adaptations
Galapagos penguins
no feathers to reduce heat
have a larger surface area to volume ratio
certain animals have to adapt to certain living conditions to survive
artic penguins
huddle to keep warm
black feathers to absorb heat
oil on their feathers to stop them from freezing
Static liquid pressure and proportionality
static pressure increases with depth
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