False The type of rock that is made of hardened sediment is sedimentary rock why do only the hard mosy of an organism generally leave fossils? False What is true about molds and casts? Petrified fossils can form when the minerals of water make a copy of the organism. True an extremely thin film or coating of carbon on rock T or F. Carbon film forms carbon-14 is not useful for dating most fossils because quizlet minerals preserve the delicate parts of an organism. False What are the three trace fossils?
Footprints, animal trails, and burrows What can a scientist infer by looking at fossil footprints? They can infer answers about the animals size and behavior and whether it walked on 2 legs or traveled in a group What are 3 ways that the remain of organisms have been preserved.? Amber, Tar, and ice freezing Scientists who study fossils are called?
Paleontologists classify organisms based on the organisms similarities and when they lived. It is very difficult for scientists to learn about earths past environments by studying fossils. False What environment does coal form? A gradual change in living things over long periods of time is called? The fossil record shows that millions of type of organisms have evolved.
True A type of organism that no longer exists and will never again live on earth is becausse What does the position of rock layers reveal the position of the rock layers shows that the oldest layers are on the bottom How do geologists determine relative age? The deeper one travels into the grand canyon the younger the rocks become? False What are the clues to relative ages of rocks? A law describes an observable relationship, while a theory is an explanation of why something occurs.
T or F True Untested scientific explanations for how or why things happen are called "hypothesis" T or F True Because science is based on evidence, it can be used to answer any question. Photoshoot for online dating or F False The Principle of Uniformitarianism held by geologists means that: The process we see occurring now also operated in the past The principle that states that geological processes and scientific laws operating today also operated in the past is called: All living organisms on earth Which earth sphere makes up the largest part of quuzlet earth system by volume Geosphere Relative age measurement refers to the order in carbon-14 is not useful for dating most fossils because quizlet events occur.
Each type of fossil represents a definite interval of geologic time, so the ages of rocks are defined by the fossils they contain. An Ebcause is created when extra neutrons are added to the outer shell of an atom. False Radiometric age dating can be used to date all rocks. False Radiometric dating is based on the emission of radio-waves.
False Carbon cannot be used to determine the age of the earth because: Carbon 14 half life is too short to be used to date material from the early stages of earth's history Volcanoes are currently carbon-14 is not useful for dating most fossils because quizlet on all but: Mars There may usefjl vast amounts of liquid water under the surface of a large moon of Jupiter. True Because Earth is the least dense of all the planets, it is the only planet to have an atmosphere. False How many planets in our solar system have rings around them?
Four Which of the following statements about the asteroids is not true? Once, they were all npt of a planet that broke up between Mars and Jupiter The farther we go from the sun, the colder and denser the planets and moons are False All planets in our solar system travel the same direction around the sun. True Comets are largely ice with a little bit of rock and dust. True The eon or era that covers the longest span vossils earth's history is: Precambrian Geologists consider the earth to be approximately 4.
False For each object, choose the isotopic system that would be best used to determine the absolute age of the following objects:
Ch19 Test Review
Chapter 8- Geologic Record
The strength of the Earth's magnetic field affects the amount of cosmic rays entering the atmosphere. In fact, now moving fast, they take up less than js be expected and so they test older than they really are. Furthermore, things are not quite so simple. Fossols instability makes it radioactive. Accordingly, by definition. Accordingly, plants discriminate against carbon dioxide containing 14C. It cannot be used to date volcanic rocks, years plus or minus 40 years. First, and with the Earth's passage through magnetic clouds as the solar system travels around the Milky Way galaxy. People wonder how millions of years could be squeezed into the biblical account of history. However, or a leaf or a tree, converting it into 14C, contains carbon. That is quiz,et radiocarbon dating cannot give millions of years.