7th Grade Science Student ebook

12.3 LIFE HISTORY CHAPTER 12: EARTH AND LIFE HISTORY 12.3 Life History Scientists have developed a model of the history of life ...

UNIT 4 EVOLUTION AND CHANGE Figure 12.16: Diplodocus is a dinosaur that lived in the Mesozoic era. Figure 12.17: Eohippus appear ...

12.3 Life History. CHAPTER 12: EARTH AND LIFE HISTORY Mass extinctions What are mass extinctions? There have been at least five ...

UNIT 4 EVOLUTION AND CHANGE Figure 12.20: The half-life of uranium-238 is 4.5 billion years. The half-life of carbon-14 is 5,730 ...

12.3 LIFE HISTORY CHAPTER 12: EARTH AND LIFE HISTORY 12.3 Section Review Explain how time is divided in the geologic time scale ...

A Tiny Challenge to Human History Imagine that an ancient band of humans had been found on a remote island. Imagine that these h ...

UNIT 4 EVOLUTION AND CHANGE 2,400,000 years ago PRESENT DAY 200,000 yrs ago 400,000 yrs ago 600,000 years ago 800,000 years ago ...

Radioactivity and Half-life Scientists use absolute dating to estimate the age of a fossil in years. Absolute dating uses the de ...

CHAPTER 12 EARTH AND LIFE HISTORY Chapter 12 Assessment Vocabulary Select the correct term to complete the sentences. Section 12 ...

CHAPTER 12 EARTH AND LIFE HISTORY Canyons and gorges are carved out of existing landmasses. The surrounding rock walls tell sto ...

UNIT 4 EVOLUTION AND CHANGE Chapter 12 Assessment.. Many theories exist about what caused the major mass extinctions throughout ...

THIS AT HOME Structure and Function in Living Things Chapter 13 The Diversity of Life Chapter 14 Plants Chapter 15 Animals Look ...

Chapter 13 The Diversity of Life Peter Rabbit is a storybook character that was created by Beatrix Potter, who lived in England ...

UNIT 5 STRUCTURE AND FUNCTION IN LIVING THINGS Figure 13.1: The seven levels of classification of the Kingdom Animalia. A mnemon ...

13.1 TAXONOMY AND SYSTEMATICS Chapter 13: The Diversity of Life Scientific names What is a scientific name? Have you ever heard ...

UNIT 5 STRUCTURE AND FUNCTION IN LIVING THINGS Figure 13.3: A cladogram shows evolutionary relationships among different organis ...

13.1 Taxonomy and Systematics. CHAPTER 13: THE DIVERSITY OF LIFE Evolution and the six kingdoms An evolutionary tree is a diagra ...

UNIT 5 STRUCTURE AND FUNCTION IN LIVING THINGS Figure 13.4: Use this diagram to answer question 5. 13.1 Section Review Who was ...

13.2 ALGAE AND FUNGI CHAPTER 13: THE DIVERSITY OF LIFE 13.2 Algae and Fungi In Chapter 7, you studied microscopic, single-celled ...

UNIT 5 STRUCTURE AND FUNCTION IN LIVING THINGS Figure 13.6: Sea lettuce. Figure 13.7: The structures of kelp are adaptations to ...