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E.S. ch.5-7

Environmental Science Chapters 5-7

puts events in sequence but doesn't give their actual age [5] relative time
measured time; identifies the actual date an event occurred and establishes its absolute age [5] absolute time
one method of determining the relative ages of the strata, or layers, in sedimentary rocks is by their position [5] superposition
process used to match the rock strata in different locations to determine if they formed at the same time [5] correlation
uses the rate of decay of naturally occurring, radioactive isotopes of elements to determine the absolute age of rocks and fossils [5] radioactive dating
the period of time it takes for half the atoms in a radioactive sample to break down into simpler, stable atoms [5] half-life
remains of organisms that existed for a brief period of geologic time and had a wide geographic distribution [5] index fossils
largest divisions of geologic time [5] eras
blocks of geologic time characterized by the appearance, disappearance, or dominance of various life-forms in the fossil record [5] periods
earliest division of geologic time [5] precambrian era
era that lasted for almost 350 million years [5] paleozoic era
era divided into 3 periods: triassic, jurassic, and creraceous; lasted for 160 million years [5] mesozoic era
the most recent era, the one we live in; began 65 million years ago [5] cenozoic era
type of blue-green bacteria that make their own food [6] cyanobacteria
everything in an organism's surroundings that is or was alive, such as plants and animals [6] biotic environment
composed of everything in an organism's surroundings that is not alive, including soil, sunlight, precipitation, atmospheric gases, sources of water, dissolved mineral salts, and geologic formations [6] abiotic environment
building blocks of life, and they are involved in all the activities carried out by an organism [6] cell
the cell's control center [6] nucleus
line the endoplasmic reticulum; sites of protein synthesis within the cell [6] ribosomes
the sites of energy production [6] mitochondria
one-celled organisms, such as paramecia, amebas, or euglenas [6] unicellular
many-celled organisms, such as rotifers or daphnias [6] multicellular
green plants that use photosynthesis to produce their own food from inorganic compounds [6] producers
those organisms that cannot make their own food [6] consumers
organisms that use green plants as food [6] primary consumers
another name for primary consumers [6] herbivores
organisms that feed on primary consumers [6] secondary consumers
another name for secondary consumers [6] carnivores
living things use oxygen from the atmosphere to release energy from from food and in the process from carbon dioxide gas [6] cellular respiration
break down the tissues and recycle the organic and inorganic compounds back into the soil [6] decomposers
modern method of classification that identifies groups of organisms and gives each a scientific name [7] taxonomy
when organisms are first placed into one of the major categories [7] kingdoms
largest division within a kingdom [7] phylum
organisms whose DNA is distributed throughout the cytoplasm of their cells [7] prokaryotes
bacteria which requires oxygen for respiration [7] aerobes
bacteria which use other chemicals to release energy [7] anaerobes
some bacteria that live on and in the bodies of other organisms [7] host
organisms whose DNA is located within a nucleus that is enclosed by a nuclear membrane [7] eukaryotes
cells that are enclosed within a cell wall, contain a nucleus, but lack chloroplasts [7] fungi
compounds that break down food materials [7] enzymes
organisms that have a backbone [7] vertebrates
animals without a backbone [7] invertebrates
Created by: boydrac13