Q&A Hero

Physic

Q: The Great Dying occurred at the end of the ______________ era.
Q: The Paleozoic era ended and the Mesozoic era began about ______________ million years ago.
Q: The Phanerozoic eon and the Paleozoic era began about ______________ million years ago.
Q: Reasonable values for the absolute ages of sedimentary rocks are frequently determined by relating them to ______________ rocks whose absolute ages have been determined.
Q: Relative and absolute geologic times are combined to give the ______________ scale.
Q: Geologic evidence places Earth's age at ______________ million years.
Q: Lack of knowledge of the phenomenon called ______________ led Lord Kelvin to an incorrect estimate of the age of Earth.
Q: Carbon dating was used to establish the age of the Shroud of ______________.
Q: ______________ dating is used specifically to establish the absolute age of organic remains.
Q: Rubidium-______________ dating is an important radiometric dating tool.
Q: An important radiometric dating process is the decay of potassium-40 to ______________-40.
Q: Primordial lead contains the isotope lead-______________, whereas radiogenic lead does not.
Q: Lead that comes from radioactive decay is called ______________ lead.
Q: Naturally occurring uranium ultimately decays to isotopes of the element named ______________.
Q: The span of time required for the radioactive decay of half the parent nuclei in a sample is known as the ______________.
Q: Atomic nuclei that decay of their own accord are said to be ______________.
Q: Geology's best tool for establishing absolute (numerical) geologic time is called ______________ dating.
Q: The concept of uniformitarianism was developed by ______________, the "father of geology."
Q: The actual age of rock layers and geologic events is referred to as ______________ geologic time.
Q: Much of our energy comes from coal that was formed from plants that lived during the ______________ period.
Q: The earliest (oldest) period in the Paleozoic era is the ______________.
Q: The Cenozoic era consists of only two periods: the ______________ and the Quaternary.
Q: The organisms called ______________ were the first organisms with eyes and were wiped out at the end of the Paleozoic era.
Q: The Jurassic period is part of the ______________ era.
Q: Eras are divided first into smaller time units called ______________.
Q: The term age of ancient life is sometimes used to refer to the ______________ era.
Q: The term age of mammals is sometimes used to refer to the ______________ era.
Q: The term age of reptiles is sometimes used to refer to the ______________ era.
Q: The oldest era in the Phanerozoic eon is the ______________ era.
Q: The time before the Phanerozoic eon is collectively called ______________ time.
Q: We live in the ______________ eon.
Q: Eons are subdivided first into ______________.
Q: The largest units of geologic time are called ______________.
Q: ______________ fossils are those typical of a particular limited time segment of Earth's history.
Q: The process of matching up rock layers in different localities by the use of index fossils or other means is called ______________.
Q: Because sediments are not deposited continuously in a given locality over time, breaks called ______________ occur in the rock record.
Q: The ______________ states that in a sequence of undisturbed sedimentary rocks, lavas, or ash, each layer is younger than the layer beneath it.
Q: The ______________ states that an igneous rock is younger than the rock layers it has disturbed.
Q: When rocks and geologic events are placed in chronological order without regard to actual dates, ______________ geologic time is obtained.
Q: Petrified wood is a common type of ______________ fossil.
Q: A fossil imprint made by the movement of an animal is called a(n) ______________ fossil.
Q: The oldest algal fossils are found on the continent of ______________.
Q: The earliest evidence of prehistoric life is the single-celled organisms called ______________.
Q: New material filling a mold forms a(n) ______________ of the original shell or bone.
Q: The hollow depression left when a shell or bone is dissolved completely out of a rock is called a(n) ______________.
Q: The Petrified National Forest is found in the state of ______________.
Q: Fossilized tree resin is called ______________.
Q: The study of fossils is called ______________.
Q: A(n) ______________ is any indication of prehistoric life preserved in rock.
Q: The study of fossils is called A) paleontology. B) biology. C) geology. D) history.
Q: Wood from an ancient stump has a ratio of carbon-14 to carbon-12 that is one-eighth that of new wood. About how old is the stump? (Carbon-14's half-life is 5730 years.) A) 17,190 years B) 11,460 years C) 5730 years D) 2865 years
Q: Any indication of prehistoric life preserved in rock is called A) a shale. B) a radionuclide. C) a fossil. D) none of these.
Q: New material filling a mold forms a ______________ of the original shell or bone. A) cast B) mold C) hole D) groove
Q: The hollow depression left when a shell or bone is dissolved completely out of a rock is called a(n) A) groove. B) hole. C) cast. D) mold.
Q: The Petrified National Forest is found in the state of A) Nevada B) New Mexico C) Arizona D) Utah
Q: The Triassic period is part of which era? A) Cenozoic B) Mesozoic C) Paleozoic D) Jurrasic
Q: Which of the following were marine invertebrates that looked like plants and left fossil segments sometimes called "Indian money"? A) Trilobites B) Gastropods C) Crinoids D) Brachiopods
Q: Stromatolites are structures created by A) algae. B) brachiopods. C) sea worms. D) trilobites.
Q: Archaeopteryx fossils are those of a prehistoric A) bird. B) crinoid. C) trilobite. D) ground sloth.
Q: The K-T impact is thought to have occurred at what site? A) Iridium B) Chicxulub C) Gubbio D) Alvarez
Q: Which occurrence is associated with the demise of the dinosaurs? A) The Great Dying B) The Cambrian explosion C) The breakup of Pangaea D) The K-T event
Q: The oldest known fossils of the genus Homo date from about how long ago? A) 6000 years B) 2 million years C) 10,000 years D) 65,000 years
Q: About how long ago was the last retreat of the glaciers from North America and Europe? A) 60,000 years B) 10,000 years C) 2 million years D) 6000 years
Q: Which epoch is also called the Ice Ages? A) Permian B) Holocene C) Pleistocene D) Cretaceous
Q: The Holocene epoch began when A) the glaciers last retreated from North America. B) a period of intense volcanic activity ended. C) an asteroid hit Chicxulub. D) Pangaea began breaking up.
Q: We live in the epoch called the A) Quaternary. B) Ordovician. C) Holocene. D) Cenozoic.
Q: We live in the period called the A) Cenozoic. B) Holocene. C) Ordovician. D) Quaternary.
Q: The Paleozoic era ended with an event called the A) Chicxulub Impact. B) Cambrian Explosion. C) Great Dying. D) Pangaean Rift.
Q: Trilobites lived during which era? A) Paleozoic B) Cenozoic C) Mesozoic D) Archeozoic
Q: The first 87% of geologic time is often called A) Hadean time. B) Pangaean time. C) Precambrian time. D) Proterozoic time.
Q: The Cenozoic era began about how many million years ago? A) 65 B) 545 C) 3 D) 245
Q: The Mesozoic era began about how many million years ago? A) 3 B) 545 C) 245 D) 65
Q: The Paleozoic era began about how many million years ago? A) 65 B) 545 C) 245 D) 3
Q: The term Cambrian explosion refers to A) an asteroid impact. B) the breakup of a supercontinent. C) intense, widespread volcanic activity. D) a proliferation of life forms.
Q: Which of the following eons is the oldest? A) Proterozoic B) Phanerozoic C) Hadean D) Archean
Q: In which of the following eons do we live? A) Phanerozoic B) Hadean C) Proterozoic D) Archean
Q: Geologists have principally used which class of rocks for radiometric dating? A) Sedimentary B) Igneous C) Foliated D) Metamorphic
Q: Geologists have principally used which class of rocks to establish the relative time scale? A) Igneous B) Foliated C) Metamorphic D) Sedimentary
Q: Geologists think that Earth is how old? A) 4560 billion years B) 45.6 thousand years C) 45.6 million years D) 4.56 billion years
Q: The Shroud of Turin, the Iceman, and the Dead Sea Scrolls were dated by use of A) Rubidium-87. B) Potassium-40. C) Carbon-14. D) Uranium-238.
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