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sawyers change eart
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| Question | Answer |
|---|---|
| what fossil leaves a imprint | mold |
| what fossil leaves a 3D shape of the organism | cast |
| what kind of fossil is footprints | trace fossil |
| what fossil is flat and mostly plants | carbon film |
| what fossil is the whole organism intact | preserved remains |
| Catastrophism - | idea that conditions and organisms on Earth change in quick , violent events |
| Uniformitarianism | - states that geologic processes that occur today are similar to those that have occurred in the past |
| relative age - | is a way of describing how old something is not by using numbers but by using a comparison |
| index fossil | - fossil of an organism that was alive for only a short period of time, were abundant and widespread geographically; scientists can use these to assign dates to rock layers |
| absolute age | - the numerical age in years of an object |
| radiometric | dating - process to determine absolute age of an object isotopes break down into other isotopes and particles |
| halflife | - time it takes for half the atoms of an isotope to decay |
| radiometric dating | not good on sedimentary rock |
| Carbon dating | only works on organic matter |
| law of superposition - | states that the youngest layers of Earth are located on the surface and as you go deeper into the Earth, the layers get older. |
| Variation - | is a slight difference in an inherited trait of individual members of a species |
| Mutations - | are random genetic changes that result in new variations |
| Natural Selection - | the process by which populations of organisms with variations that help them survive, live longer, compete better and reproduce more than those that do not have those variations. |
| Adaptation | - an inherited trait that increases an organism’s chance of surviving and reproducing in its environment |
| Camouflage - | an adaptation that enables a species to blend in with its environment |
| Mimicry - | an adaptation that imitates the appearance of another species |
| Disease | - abnormal condition, a disorder of a structure or function, that affects part or all of an organism. |
| Infectious disease | - disease caused by a virus, bacterium, fungus or protist that is spread from an infected organism or the environment to another organism |
| Noninfectious disease | - diseases that are noncommunicable and cannot be spread, sometimes called chronic diseases because they last a long time |
| Pathogen - | disease producing organism |
| Vector - | any agent (person, animal, or microorganism) that carries and transmits an infectious pathogen into another living organism. |
| Bacteria - | unicellular microorganisms that have cell walls but lack organelles and an organized nucleus |
| Virus - | microscopy, and is able to multiply only within the living cells of a host invective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light |
| Fungus - | eukaryotic organisms that includes unicellular microorganisms such as yeasts and molds, as well as multicellular fungi that produce familiar fruiting forms known as mushrooms |
| Protist - | unicellular or multicellular organism that can be plantlike , animal like, or funguslike |
| Host cell - | living cell in which a virus can actively multiply or in which a virus can hide until activated by environmental stimuli. |
| Replication | - viruses can copy themselves by attaching to a host cell and using the cell as a factory to copy itself. |
| Mutation - | enable viruses to adjust to changes in their host cells and are the reason why viruses such as the flu are different every year |
| Antibody - | a protein that can attach to a pathogen and make it useless, if you have the right antibodies you are immune to a virus |
| Antiviral drugs | - medicine that prevents a virus from entering a cell, antiviral drugs are only good for one virus and not all viruses have one |
| Vaccine | - mixture containing material from one or more deactivated pathogens (usually viruses), hleps bodies to form antibodies |
| Antibiotics - | some bacteria produce these chemicals that limit the growth of other bacteria |
| Toxins - | poisonous substances produced by some bacteria |
| Endospores - | thick walled structures that some bacteria produce to survive during hard times |
| Epidemic - | a widespread occurrence of an infectious disease in a community at a particular time |
| Pandemic - | is an epidemic of infectious disease that has spread through human populations across a large region; for instance multiple continents, or even worldwide. |
Created by:
sawyerf
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