the idea that Earth has always changed in uniform ways and that the present is the key to the past.

Fossils are the preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud, under ancient seas, lakes and rivers.

geological records of the activities and behaviors of past life. Some examples include rock evidence of nests, burrows, footprints, and scat. These fossils are different from body fossils that preserve the actual remains of a body such as shells or bones.

Climate is defined as an area's long-term weather patterns. The simplest way to describe climate is to look at average temperature and precipitation over time.

Ice cores are cylinders of ice drilled out of an ice sheet or glacier. Most ice core records come from Antarctica and Greenland, and the longest ice cores extend to 3km in depth.

Relative dating is the qualitative sequencing of events based on the surrounding structures. For example, a rock layer higher up is younger than the rock layers below. Inclusions within the rock layers can be sequenced based on their relative position.

the condition in which a quantum system can exist in multiple states or configurations simultaneously

when an older rock formation has been deformed or partially eroded before a younger rock layer, usually sedimentary, is laid down.

a record of the rock layers in a particular area across geologic time.

measure the physical properties of an object itself and use these measurements to calculate its age

Radioactive decay is the emission of energy in the form of ionizing radiation. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes.

The half-life of a drug is the time it takes for the amount of a drug's active substance in your body to reduce by half. This depends on how the body processes and gets rid of the drug. It can vary from a few hours to a few days, or sometimes weeks.

In radiometric dating, geochronologists use radioactive isotopes, which are atoms of the same element that have the same number of protons but a different number of neutrons.

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unit 7

Term	Definition
uniformitarianism	the idea that Earth has always changed in uniform ways and that the present is the key to the past.
fossil	Fossils are the preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud, under ancient seas, lakes and rivers.
trace fossil	geological records of the activities and behaviors of past life. Some examples include rock evidence of nests, burrows, footprints, and scat. These fossils are different from body fossils that preserve the actual remains of a body such as shells or bones.
climate	Climate is defined as an area's long-term weather patterns. The simplest way to describe climate is to look at average temperature and precipitation over time.
ice core	Ice cores are cylinders of ice drilled out of an ice sheet or glacier. Most ice core records come from Antarctica and Greenland, and the longest ice cores extend to 3km in depth.
relative dating	Relative dating is the qualitative sequencing of events based on the surrounding structures. For example, a rock layer higher up is younger than the rock layers below. Inclusions within the rock layers can be sequenced based on their relative position.
superposition	the condition in which a quantum system can exist in multiple states or configurations simultaneously
unconformity	when an older rock formation has been deformed or partially eroded before a younger rock layer, usually sedimentary, is laid down.
geologic column	a record of the rock layers in a particular area across geologic time.
absolute dating	measure the physical properties of an object itself and use these measurements to calculate its age
radioactive decay	Radioactive decay is the emission of energy in the form of ionizing radiation. Ionizing radiation can affect the atoms in living things, so it poses a health risk by damaging tissue and DNA in genes.
half-life	The half-life of a drug is the time it takes for the amount of a drug's active substance in your body to reduce by half. This depends on how the body processes and gets rid of the drug. It can vary from a few hours to a few days, or sometimes weeks.
radiometric dating	In radiometric dating, geochronologists use radioactive isotopes, which are atoms of the same element that have the same number of protons but a different number of neutrons.

Created by: spxcw btw

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