Chemistry
pure substance made up of 1 atom
Element
An organism that makes its own food
producer
Energy source naturally replenished over time
renewable energy
Water stored underground in rock layers
aquifer
Preserved remains or traces of ancient organisms
fossil
A mixture with uniform composition
Homogeneous mixture
Which macronutrient provides the MOST energy for organisms
carbohydrates
Fossil fuels are this type of energy resource
nonrenewable energy
The measure of how cloudy water is
turbidity
Structures with similar anatomy showing common ancestry
homologous structures
Two or more elements chemically combined
compound
The process cells use to release energy from food
cellular respiration
Gas released from burning fossil fuels that traps heat
carbon dioxide
The amount of oxygen dissolved in water
dissolved oxygen
The process where organisms better adapted survive and reproduce
natural selection
The law stating matter cannot be created or destroyed
Law of Conservation of Mass
A relationship where one benefits and the other is unaffected
commensalism
Energy produced by moving water
hydroelectric energy
A body of water where freshwater mixes with saltwater
estuary (brackish water)
A fossil used by scientists to determine the relative age of rock layers
index fossil
A substance formed when two liquids mix and create a solid
precipitate
This cycle moves carbon through the atmosphere, organisms, oceans, and Earth materials
carbon cycle
A student has a fever, cough, and body aches. Antibiotics do not help because the pathogen reproduces inside host cells. What type of pathogen is most likely causing the illness?
virus
Excess nitrates and phosphates causing rapid algae growth
eutrophication
The theory stating Earth’s continents were once connected as one landmass and slowly moved apart
continental drift