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Definition
| The time it takes for half of the parent isotope to break down into the daughter isotope. |
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Term
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Definition
| Atoms of the same element that differ in the number of neutrons? |
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Definition
| A negatively charged subatomic particle. |
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Term
| Which sub-atomic particles are located in the nucleus of the atom? |
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Definition
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Term
If I have Carbon-12, Carbon-14, and Carbon-18, how many protons does each one have? |
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Term
| The idea that early Earth history was affected by sudden, dramatic events that changed the Earth is called? |
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Definition
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| The scientists who developed the ideas of Catastrophism, Uniformitarianism and Evolution did not believe in a divine creator. |
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| A scientist discovers that half of a sample of Iridium 194 takes 10,000 years to decay to Renium 190. In another 10,000 years how much Renium 190 can the scientist expect to find? |
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Definition
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Term
| The principle of horizontality states that: |
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Definition
| Sediment if undisturbed will form horizontal layers. |
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Term
| A scientist studies a sedimental rock formation and finds a column of different rock mixed in with the other rock. Is the column older or newer than the other rock? |
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Definition
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Term
A scientist studies a fossil and wants to know the best technique for dating it. The fossil is from the Cretaceous period. Is Carbon dating a good technique in this situation. Why or why not? |
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Definition
| No because the sample is so old. |
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Term
| In beta decay, the nucleus emits a helium nucleus. (T or F) |
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Definition
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Term
| In alpha decay, the number of protons in the nucleus increases. (T or F) |
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Definition
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Term
| How are varves like tree rings. |
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Definition
| Varves are annual layers of light and dark colored bands of sediment. |
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Term
| The Law of Superposition can tell you the actual age of a rock. (T or F) |
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Definition
| False, it is a relative dating method. |
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Term
| Erosion drops about 30 tons of material a year at a deposition point. (T or F) |
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Definition
| No, it drops about 30 cm a year. |
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Term
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Definition
| a break in the geologic record. |
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Term
| Carbon-14 occurs naturally in the atmosphere. (T or F) |
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Definition
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Definition
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Term
| The law that states that a fault or igneous intrusion is younger than the rock layers it cuts through is called: |
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Definition
The Law of Crosscutting Relationships |
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Term
| Varve count, rates of erosion and rates of deposition are all examples of: |
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Definition
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| In the following situation explain what type of particle is emitted from the nucleus. Potassium 40 decays into argon 39. |
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Definition
The nucleus lost a proton. |
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Term
| In the following situation explain what type of particle is emitted from the nucleus: Uranium-238 to Thorium-234 |
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Definition
Alpha decay. The nucleus lost two neutrons and two protons. |
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Term
| In the following situation explain what type of particle is emitted from the nucleus: Thorium-234 to Radium-230. |
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Definition
Alpha decay. Two protons and two neutrons. |
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Term
In the following situation explain what type of particle is emitted from the nucleus: Carbon-14 to Nitrogen-14. |
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Definition
A beta particle. A neutron changes to a proton and a neutrino and electron are ejected from the nucleus. |
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Term
In a chemical reaction, the nucleus emits either an alpha, beta or gamma particle. (T or F). |
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Definition
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Term
| Pollen is good for relative dating because it can last up to 400 million years. (True or False). |
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Definition
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Term
If a sample of potassium-40 takes 1.25 billion years for one half-life, how many years will have passed after three half-lifes. |
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Definition
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Term
| Cation relative dating would use (metals or non-metals) to determine the age of an artifact. |
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Definition
Metals-they tend to lose an electron creating a positively charged atom.. |
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Term
| If I start with 10 grams of a parent isotope, how many grams of a daughter isotope will I have after two half-lives? |
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Definition
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Definition
| | | [image] | The spontaneous emission of particles and/or energy from atomic nuclei. |
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Definition
Energy that is radiated or transmitted in the form of rays or waves or particles. |
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Term
| Radioactivity is always dangerous (T or F). |
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Definition
False: Since radioactivity is energy that is radiated or transmitted in the form of rays or waves or particles then sunlight, heat from a fire place and other forms of energy is all radioactivity. |
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Term
Potassium-40 means that potassium has 40 protons (True or False). |
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Definition
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| Radiometric dating is unreliable because nuclei tend to lose protons and neutrons at random, haphazard rates. (True or False) |
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Definition
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Term
Samples of Uranium are very dangerous if found in nature because they might explode at any time. |
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Definition
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Term
| Because the fossil record is inconsistent and does not show a lot of missing links, it is proof that evolution does not occur. |
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Definition
False, Fossils are rare because the Earth is constantly changing causing erosion and decay of most organic material. |
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Term
| The observation that animals fossils follow or succeed each other in time in a predictable manner is known as |
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Definition
the Law of Faunal Succession. |
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