7th Grade Science Student ebook

18.4 Hearing. CHAPTER 18: VISION AND HEARING 18.4 Section Review What is a wave? Why is sound a wave? Explain why sound waves a ...

Retina Focal point Concave lens Nearsightedness Concave lens Retina Convex lens Farsightedness Convex lens Focal point Keeping T ...

Unit 6 THE HUMAN BODY has trouble focusing on objects that are close, that person is farsighted. Many people become farsighted l ...

Human Ear Model Ears are truly amazing organs. The ear picks up mechanical sound waves (vibrating air molecules) and translates ...

CHAPTER 18 VISION AND HEARING Chapter 18 Assessment Vocabulary Select the correct term to complete the sentences. Section 18.1 ...

CHAPTER 18 VISION AND HEARING What is the difference between sensory and motor neurons? Put the following events of a withdrawa ...

UNIT 6 THE HUMAN BODY Chapter 18 Assessment.. Explain how the design of traffic lights helps people with color blindness. Sect ...

CHAPTER 18 VISION AND HEARING Section 18.4 Write short play that explains how a sound wave travels through the ear. Include how ...

Glossary A glossary is an alphabetical list of important words found in the sections in this book. Use this glossary just as you ...

base sequence – the order of base pairs along a gene. bilateral symmetry – a body plan that consists of two similar halves. biol ...

Glossary compact bone – the layer of bone that provides most of its strength. competition – when organisms in a community vie fo ...

epithelial tissue – made up of closely packed cells in one or more layers. Lines the internal and external body surfaces. eukary ...

Glossary genetics – the study of heredity. genome – the total amount of hereditary material in a single cell of an organism. gen ...

inverse relationship – a relationship in which one variable decreases when another variable increases. invertebrate – an animal ...

Glossary N natural selection – the process by which organisms with favorable adaptations survive and reproduce at a higher rate ...

photosynthesis – a process where plants use the energy of sunlight to produce carbohydrates. photosynthetic bacteria – bacteria ...

Glossary retina – a thin layer of cells in the back of the eye that converts light into nerve signals. rhizoids – root-like grow ...

therapsids – an extinct group of reptiles from which mammals evolved. tissue – a group of specialized cells that performs a part ...

Index The index gives the page numbers where you can find a word, definition, information about a topic or a large category. You ...

chemical reaction................. 72 chlorophyll................. 104, 120 chloroplast................. 104, 118 chromosome.... ...