Answer: At 0 years, an event took place which is known as metamorphosis of igneous rock i.e., formation of igneous rocks from melted magma.
Strontium-90 is a radioactive element which undergoes beta decay to form yttrium-90. It has a half life of approximately 28 years and decay energy of 0.546 MeV. This radioactivity is used by geologist to estimate the age of the rock, fossils, meteorites etc. Other radioactive elements used by the geologists are carbon-40, potassium-40 etc.
Radiometric clock is set when the rock was formed in the past i.e., the moment when an ingenious rock was solidified from molten magma.
Explanation: brainly.com/question/13852592
Answer:
The downtown area of Atlanta was revitalized.
Explanation:
The answer is Thomas Edison.
<span>Sumner thinks that men are responsible for more of the outdoor chores and heavy lifting. For example, where it would be a woman’s role to tend to the garden or decorate, a man would mow the lawn or move heavy equipment.</span>