Sentences with phrase «radioactive uranium»

"Radioactive uranium" refers to a type of uranium that gives off a form of energy called radiation. This energy is harmful and can be dangerous to living organisms. Full definition
Instead, this «gold mine bug» gets energy from radioactive uranium in the depths of the mine.
In addition, new calculations of amounts of radioactive uranium in Jebel Irhoud sediment enabled dating the previously unearthed a child's jaw from the site to between around 350,000 and 220,000 years ago.
You look for rocks of appropriate age, which we can determine by measuring radioactive uranium isotopes and their products in the volcanic rocks interspersed with them, and study their composition.
A patina of calcite coated the fragment, and the researchers used radioactive uranium in the mineral to date the bone to about 55,000 years old.
In these regions they found zircons, hardy little crystals that are valued because they suck up enough radioactive uranium to be used for dating.
The indoor radon action levels for US homes and schools were adopted in response to the use of radioactive uranium mill tailings sand in construction and soil fill for homes and schools in the western US; recognized in the 1970's as one of the first direct community health risks from the process of uranium mining.
Zircons are natural timekeepers because, during crystallization, they incorporate radioactive uranium and thorium, but exclude lead.
Made with radioactive uranium, a celestial, Kirlian - like fog is captured inside their thin white frames: the proverbial ghost in the machine.
Crystal Palace: The Great Exhibition of the Works of Industry of All Nuclear Nations by Japanese pair Ken and Julie Yonetani underscores the global proliferation of nuclear - generating nations through the use of radioactive uranium glass; Bounpaul Phothyzan «s We Live (2013) is a site - specific exploration of politicized environmental damage in Bolikhamxay Province in Laos.
Groundwater can be polluted not only from the heavy metals present in mine waste, but also from the traces of radioactive uranium still left in the waste.
Analyses of thin mineral deposits partly covering painted cave areas provided minimum age estimates for the art, based on known decay rates of radioactive uranium in the rock.
He theorized and later showed that the rays came from the radioactive uranium salts.
The slag, which typically includes some radioactive uranium and radium in addition to calcium minerals, is the waste product from the conversion of phosphate ore to phosphorus.
Shock waves from that meteorite impact deformed the minerals that made up the rock beneath the crater, including small, tough crystals that contain trace amounts of radioactive uranium and lead.
In June archaeologist Alistair Pike, now at the University of Southampton, described a clever way to get answers: Analyze the breakdown of radioactive uranium - 234 embedded in the natural mineral crust that forms on top of the artworks.
Jorge M. Seminario and Narendra Kumar note that it is highly likely that radioactive uranium and plutonium have leaked into the soil and groundwater near nuclear facilities.
But uranium - lead dating, in which researchers estimate the age of a rock by comparing its concentrations of radioactive uranium and the lead it decays into, tells a different story.
During the course of the experiment, the radioactive uranium may or may not emit a particle.
What happens to that radioactive uranium after it has given up most of the energy?
Radiometric or radioactive dating steps jump to radioactive decay radiometric dating formula example of a radioactive uranium lead dating decay chain from lead - radiometric or radioactive dating steps step in such a chain is characterized by a distinct half - life.
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