Information you will need:
Uranium-238 to Lead-206 - half-life 4.5 billion years
Uranium-235...
Biology, 10.12.2020 06:20 Heartlesskiidkii
Information you will need:
Uranium-238 to Lead-206 - half-life 4.5 billion years
Uranium-235 to Lead-207 – half-life 713 million years
Carbon-14 to Nitrogen – 14 – half-life 5730 years
1) A zircon crystal from a lava flow was examined for geologic age. The
scientists measured the 235U, and 207Pb, and determined that 25% of
the atoms were 235U, and 75% were 207Pb.
b) What is the absolute age of the Lava flow?
Answers: 1
Another question on Biology
Biology, 21.06.2019 14:30
Most scientific questions are based on opinions. hypotheses. observations. experimental data.
Answers: 1
Biology, 22.06.2019 03:50
How are gross production and net production different? a. net production is always greater than gross production. b. net production is always less than gross production. only animals have net production. d. only plants have net production. select the best answer from the choices provided
Answers: 1
Biology, 22.06.2019 18:00
Is a fossil fem that support wegener's hypothesis of continental drift a. gondwanded b. kannemerid c. mesosaurus d. glossopters
Answers: 1
Biology, 22.06.2019 18:10
Which chemical reaction shows photosynthesis? a. water + carbon dioxide + sunlight → oxygen + glucose b. carbon + oxygen → carbon dioxide c. hydrogen + oxygen → water d. nitrogen + hydrogen → ammonia
Answers: 1
You know the right answer?
Questions
Mathematics, 29.10.2019 19:31
Social Studies, 29.10.2019 19:31
Spanish, 29.10.2019 19:31
English, 29.10.2019 19:31
History, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
English, 29.10.2019 19:31
Chemistry, 29.10.2019 19:31
Biology, 29.10.2019 19:31
Social Studies, 29.10.2019 19:31
Mathematics, 29.10.2019 19:31
