'Parent isotope' diaporamas de présentation

Chapter 25

Chapter 25. The History of Life on Earth. Overview: Lost Worlds. Past organisms were very different from those now alive The fossil record shows macroevolutionary changes over large time scales including The emergence of terrestrial vertebrates The origin of photosynthesis

1.47k views • 136 slides

Chapter 25

Chapter 25. The History of Life on Earth. Overview: Lost Worlds. Past organisms were very different from those now alive The fossil record shows macroevolutionary changes over large time scales including The emergence of terrestrial vertebrates The origin of photosynthesis

1.55k views • 136 slides

Chapter 25

Chapter 25. The History of Life on Earth. Overview: Lost Worlds. Past organisms were very different from those now alive The fossil record shows macroevolutionary changes over large time scales including The emergence of terrestrial vertebrates The origin of photosynthesis

1.54k views • 136 slides

Free-Response Question

Free-Response Question. Microevolution is the change in the gene pool from one generation to the next. Describe three ways in which microevolution can take place B. Describe the difference between microevolution and macroevolution. Answer to free response. Define microevolution and its causes

1.03k views • 83 slides

899 views • 72 slides

Chapter 25

Chapter 25. The History of Life on Earth. Overview: Lost Worlds. Past organisms were very different from those now alive The fossil record shows macroevolutionary changes over large time scales including The emergence of terrestrial vertebrates The origin of photosynthesis

845 views • 72 slides

Overview: Lost Worlds

Overview: Lost Worlds. Past organisms were very different from those now alive The fossil record shows macroevolutionary changes over large time scales including The emergence of terrestrial vertebrates The origin of photosynthesis Long-term impacts of mass extinctions. Fig. 25-1.

799 views • 69 slides

Chapter 25

Chapter 25. The History of Life on Earth. Overview: Lost Worlds. Past organisms were very different from those now alive. The fossil record shows macroevolutionary changes over large time scales including The emergence of terrestrial vertebrates The origin of photosynthesis

877 views • 64 slides

Chapter 25

Chapter 25. The History of Life on Earth. Overview: Lost Worlds. Past organisms were very different from those now alive. The fossil record shows macroevolutionary changes over large time scales including The emergence of terrestrial vertebrates The origin of photosynthesis

742 views • 64 slides

Chapter 25

Chapter 25. The History of Life on Earth. Concept 25.1: Conditions on early Earth made the origin of life possible. Chemical and physical processes on early Earth may have produced very simple cells through a sequence of stages: 1. Abiotic synthesis of small organic molecules

706 views • 58 slides

Dating rocks

Dating rocks. Relative dating Using a set of principles to put rocks in their proper sequences of formation Absolute dating Using radioactive decay to determine the exact age of rocks.

1.56k views • 49 slides

Lecture 12: Radioactivity

Lecture 12: Radioactivity. Questions How and why do nuclei decay? How do we use nuclear decay to tell time? What is the evidence for presence of now extinct radionuclides in the early solar system? How much do you really need to know about secular equilibrium and the U-series? Tools

636 views • 36 slides

Geological Time - really, really, really long!

Geological Time - really, really, really long!. Motion pictures are generally projected at 32 frames per second. Therefore, each frame (image) is on the screen for only split second- let each frame represent 100 years. Start movie at present and go back in time.

316 views • 31 slides

399 views • 23 slides

isotopes

isotopes. APPLICATIONS of nuclear processes. Military Power Radiation Many important economic and social benefits are derived from the use of isotopes and radiation: to observe and measure physical, chemical, and biological processes. Stable isotopes.

443 views • 19 slides

Half Life Practice

534 views • 17 slides

Half-life

Half-life. Measuring the speed of radioactive decay. Why?. It can be difficult to determine the ages of objects by sight alone. e.g. It can be difficult to tell which students in a classroom are oldest.

399 views • 13 slides

248 views • 11 slides

Chapter 4. Geological History of Earth

195 views • 8 slides

Absolute Dating

Absolute Dating. Absolute dating is the determination of an exact date Geologists use radiometric dating, which follows the principle of radioactive decay Radioactive decay occurs when a radioactive atom spontaneously decays to a different atom at regular rates through time.

450 views • 3 slides