flashcard
1 / 24
Front
Absolute dating
❮ prev
next ❯
1 / 24
Back
"determining the age of an object or event in years, usually by measuring the amount of unstable atoms in the sample"
❮ prev
next ❯
terms list
Absolute dating
"determining the age of an object or event in years, usually by measuring the amount of unstable atoms in the sample"
Anaerobic
describes an organism that does not need oxygen
Australopithecine
an early hominid that evolved more than 3.6 million years ago
Cenozoic era
"the period in the geologic time scale beginning about 65 million years ago and continuing until the present day"
Eukaryotic cell
a cell that contains a central nucleus and a complicated internal structure
Extinct
describes a species of organism that has died out completely
Fossil
the solidified remains or imprints of a once-living organism
Geologic time scale
the division of Earth's history into distinct intervals of time
Half-Life
"for a particular radioactive sample, the time it takes for one-half of the sample to decay"
Hominid
"the family referring specifically to humans and several extinct, humanlike species, some of which were human ancestors"
Mass Extinction
a period when a large number of species die out at the same time
Mesozoic era
"the period in the geologic time scale beginning about 248 million years ago and ending about 65 million years ago"
Neanderthal
"a species of hominid that lived in Europe and western Asia from 230,000 years ago to about 30,000 years ago"
Ozone
"a gas molecule that is made up of three oxygen atoms; absorbs ultraviolet radiation from the sun"
Paleozoic era
"the period in the geologic time scale beginning about 570 million years ago and ending about 248 million years ago"
Pangaea
"the single landmass that contained all the present-day continents 200 million years ago"
Photosynthesis
the process by which plants capture light energy from the sun and convert it into sugar
Plate tectonics
"the study of the forces that drive the movement of pieces of Earth's crust around the surface of the planet"
Precambrian time
"the period in the geologic time scale beginning when Earth originated, 4.6 billion years ago, and ending when complex organisms appeared, about 540 million years ago"
Primate
"a type of mammal that includes humans, apes, and monkeys; typically distinguished by opposable thumbs and binocular vision"
Prokaryotic cell
a cell that does not have a nucleus or any other membrane-covered organelles; also called a bacterium
Prosimian
"the first primate ancestors; also a group of living primates that includes lorises and lemurs"
Relative dating
determining whether an event or object, such as a fossil, is older or younger than other events or objects
Sediment
"fine particles of sand, dust, or mud that are deposited over time by wind or water"
more from user
Caseworker Exam (including part 1 of interview questions)
85 items
en en
PRACTICE Test
46 items
en en
NTR 109 EXAM 3
70 items
en en
NTR109 EXAM 2A
129 items
en en
NTR109 EXAM 2A
129 items
en en
NTR109 EXAM 2
129 items
en en
NTR109 EXAM 2
2 items
en en
SUMMER NUTR 109 (FOOD LABELS & CARBS)
150 items
en en
NTR108 EXAM 2
113 items
en en
NTR108: Exam 1, NTR108, NTR 108 Exam 1
123 items
en en
NTR108, NTR 108 Exam 1
92 items
en en
NTR 108 Exam 1
71 items
en en
likely
Animal Physiology Chapter 8
86 items
en en
10.1.1 Incident Command Instructions :
40 items
en en
MKT 320 Chapter 1
21 items
en en
biology
58 items
en en