Chapter 1 Bellringer # 6 A light microscope that has an objective lens of 10 x and an ocular lens of 20 x has a magnification of 30x 200x 300x 2000x Open text to pg 279. Set up notes for chapter 14. Keep your preview page out.

Chapter 14 History of Life Conceptual Strand 2: All life is interdependent and interacts with the environment. 2.6 Predict how a specific environmental change may lead to the extinction of a particular species.   2.7 Analyze factors responsible for the changes associated with biological succession.

Chapter 14 Table of Contents Section 1 Biogenesis History of Life Chapter 14 Table of Contents Section 1 Biogenesis Section 2 Earth’s History Section 3 The First Life-Forms

Section 1 Biogenesis Chapter 14 Objectives Compare the principle of biogenesis with the idea of spontaneous generation. Summarize the results of experiments by Redi and by Spallanzani that tested the hypothesis of spontaneous generation. Describe how Pasteur’s experiment disproved the hypothesis of spontaneous generation. Summarize the concept of half-life

Section 1 Biogenesis Chapter 14 Redi’s Experiment 1600s: thought organisms could arise from nonliving material by spontaneous generation.

Redi’s Experiment, continued Section 1 Biogenesis Chapter 14 Redi’s Experiment, continued 1668: Redi showed rotting meat kept away from flies would not produce new flies. Maggots appeared only on meat that had been exposed to flies.

Spallanzani’s Experiment Section 1 Biogenesis Chapter 14 Spallanzani’s Experiment 1700s: Spallanzani showed microorganisms would not grow in broth when its container was heated and then sealed. He inferred that microorganisms do not arise spontaneously but, are carried in air.

Spallanzani’s Experiment Section 1 Biogenesis Chapter 14 Spallanzani’s Experiment

Section 1 Biogenesis Chapter 14 Pasteur’s Experiment 1800s: Pasteur used a variation of Spallanzani’s design to prove that microorganisms are carried in air and do not arise by spontaneous generation.

Section 1 Biogenesis Chapter 14 Pasteur’s Experiment

Isotopes: atoms with varying numbers of neutrons. Section 2 Earth’s History Chapter 14 Radiometric Dating Isotopes: atoms with varying numbers of neutrons.

half-life: time that one-half of a sample takes to decay. Section 2 Earth’s History Chapter 14 The Formation of Earth, continued Radiometric Dating ages of rocks can be determined by measuring amount of radioactive decay that has occurred. half-life: time that one-half of a sample takes to decay.

Section 2 Earth’s History Chapter 14 Radioactive Decay

Chapter 14 Radiometric Dating Section 2 Earth’s History Click below to watch the Visual Concept. Visual Concept

Miller-Urey Experiment Section 2 Earth’s History Chapter 14 Miller-Urey Experiment

Spontaneous generation Radiometric dating Isotopes Mass number 14 Vocab Biogenesis Spontaneous generation Radiometric dating Isotopes Mass number 6. Radioactive decay 7. half-life 8. Redi’s Experiment 9. Spallanzani’s Experiment 10. Pasteur’s Experiment