https://padlet.com/304353/rp59hdwpv4ng Science Period: 3 en-us 2018-01-22 19:20:12 UTC 2018-01-22 19:47:54 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Xmastree.png 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223516558 The geologic time scale is a system of chronological dating that relates geological strata to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing.]]> 2018-01-22 19:24:27 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223516558 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223516887 2018-01-22 19:25:01 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223516887 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223517201 In geology and related fields, a stratum is a layer of sedimentary rock or soil, or igneous rock that were formed at the earth's surface, with internally consistent characteristics that distinguish it from other layers]]> 2018-01-22 19:25:32 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223517201 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223517578 2018-01-22 19:26:04 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223517578 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223517881 An idealized cycle of processes undergone by rocks in the earth's crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion.]]> 2018-01-22 19:26:33 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223517881 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223518314 2018-01-22 19:27:15 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223518314 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223518623 2018-01-22 19:27:45 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223518623 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223518664 A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, hair, petrified wood, oil, coal, and DNA remnants.]]> 2018-01-22 19:27:48 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223518664 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223519710 The history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to the understanding of the main events of Earth's past. The age of the Earth is approximately one-third of the age of the universe.]]> 2018-01-22 19:29:26 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223519710 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223520260 2018-01-22 19:30:22 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223520260 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223521129 2018-01-22 19:31:49 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223521129 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223521177 The time taken for the radioactivity of a specified isotope to fall to half its original value.]]> 2018-01-22 19:31:55 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223521177 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223521584 A method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.]]> 2018-01-22 19:32:39 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223521584 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223522099 2018-01-22 19:33:32 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223522099 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223522367 2018-01-22 19:34:03 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223522367 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223522386 Radiocarbon dating is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.]]> 2018-01-22 19:34:06 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223522386 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223522650 Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron.]]> 2018-01-22 19:34:38 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223522650 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223522917 2018-01-22 19:35:04 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223522917 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223523442 2018-01-22 19:35:53 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223523442 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223523483 The age of the Earth is approximately 4.54 ± 0.05 billion years (4.54 × 10⁹ years ± 1%). This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.]]> 2018-01-22 19:35:57 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223523483 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223524504 Mercury is a chemical element with symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum.]]> 2018-01-22 19:37:49 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223524504 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223525299 2018-01-22 19:39:06 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223525299 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223525652 Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. It has the longest rotation period of any planet in the Solar System and rotates in the opposite direction to most other planets. It has no natural satellites.]]> 2018-01-22 19:39:45 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223525652 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223525849 2018-01-22 19:40:04 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223525849 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223526803 Earth is the third planet from the Sun and the only object in the Universe known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4 billion years ago]]> 2018-01-22 19:41:37 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223526803 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223527121 2018-01-22 19:42:10 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223527121 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223528295 2018-01-22 19:44:13 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223528295 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223528328 Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.]]> 2018-01-22 19:44:17 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223528328 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223529623 Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a giant planet with a mass one-thousandth that of the Sun, but two-and-a-half times that of all the other planets in the Solar System combined.]]> 2018-01-22 19:45:31 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223529623 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223529829 2018-01-22 19:45:53 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223529829 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223530045 Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius about nine times that of Earth.]]> 2018-01-22 19:46:14 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223530045 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223530353 2018-01-22 19:46:43 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223530353 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223530532 Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System]]> 2018-01-22 19:46:58 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223530532 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223530733 2018-01-22 19:47:20 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223530733 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223530881 Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet.]]> 2018-01-22 19:47:36 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223530881 304353 https://padlet.com/304353/rp59hdwpv4ng/wish/223531041 2018-01-22 19:47:52 UTC https://padlet.com/304353/rp59hdwpv4ng/wish/223531041