Tài liệu Ebook science in our world

Space and Technology by Zachary Cohn Genre Nonfiction Comprehension Skill Put Things in Order Text Features • Captions • Glossary Science Content Technology Scott Foresman Science 1.12 ISBN 0-328-13766-9 ì<(sk$m)=bdhg e< +^-Ä-U-Ä-U Vocabulary inclined plane lever pulley screw WhatScience did you learn? in Our 1. Where does food come from? Zachary Cohn 2. What areby simple machines? Name some simple machines and describe what they do. 3. Tools make doing jobs faster and easier. Write to describe some of the tools used to make and serve dinner. Use words from the book as you write. 4. Put Things in Order What happens to a tree before it is cut in a mill? simple machine technology wedge wheel and axle Photographs: Every effort has been made to secure permission and provide appropriate credit for photographic material. The publisher deeply regrets any omission and pledges to correct errors called to its attention in subsequent editions. Unless otherwise acknowledged, all photographs are the property of Scott Foresman, a division of Pearson Education. Photo locators denoted as follows: Top (T), Center (C), Bottom (B), Left (L), Right (R) Background (Bkgd) Opener: ©Peter Beck/Corbis; 2 ©M. H. Black/Robert Harding Picture Library Ltd., ©Randy Wells/ Corbis; 3 ©DK Images; 4 ©Sylvain Saustier/Corbis; 5 ©Ken Wagner/Visuals Unlimited, (TR) ©Eric and David Hosking/Corbis; 6 ©Byron Jorjorian/Bruce Coleman Inc.; 7 ©Stone/Getty Images; 10 ©Grant Heilman Photography; 12 ©Royalty-Free/Corbis; 14 (BC, CR) ©Royalty-Free/Corbis ISBN: 0-328-13766-9 Copyright © Pearson Education, Inc. All Rights Reserved. Printed in the United States of America. This publication is protected by Copyright and permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permissions, write to: Permissions Department, Scott Foresman, 1900 East Lake Avenue, Glenview, Illinois 60025. 3 4 5 6 7 8 9 10 V010 13 12 11 10 09 08 07 06 05 World How do farmers use technology to grow food? Machines help farmers. Food comes from many places. Technology is using science to Food comes from lakes. solve problems. Food comes from animals. Technology changes with time. Machines are technology. Food comes from farms. 2 3 Planting and Growing Corn The farmer plants seeds. The farmer plows the soil. The farmer uses a seed drill. The plow makes the job easier. A seed drill is technology. The plow is technology. It makes the work go faster. The soil is ready to plant. 4 5 How does food get from the farm to the store? The corn is ready to sell. The corn plants grow. The truck takes the corn to the store. It is put on a truck. The farmer picks the corn. This is called a harvest. Machines help the farmer. 6 7 What tools can you use to make dinner? Serving Dinner People use tools. What will you use? Tools make work easier. A spoon can lift the meat. Each tool is used for a different job. Tongs can pick up lettuce. 8 We need tools to make dinner. 9 How do builders get wood for a house? Moving Logs to the Sawmill Workers used axes long ago. It places them on the truck. Now they use machines. The truck goes to the mill. One machine cuts the trees. The logs are cut in the mill. This machine picks up the logs. One moves the heavy logs. 10 11 A wedge is a simple machine. What are simple machines? It pushes things apart. People use simple machines. A wheel and axle is a simple A simple machine is a tool. machine. It has few or no moving parts. It moves things. Simple machines help do jobs. This wheelbarrow has a wheel and axle. This shovel is a wedge. 12 13 Using Simple Machines A screw holds things together. What can you use to communicate? A lever lifts things. Computers are technology. A pulley moves things up Technology is used to communicate. and down. The ways we communicate An inclined plane has one high have changed. end and one low end. 14 15 Vocabulary Glossary What did you learn? inclined plane 1. Where does food come from? inclined plane lever pulley lever screw simple pulleymachine technology wedge screw wheel and axle a simple machine that is high at one end and low at the other end a simple machine that is used to lift something a simple machine that is used to hold things together Photographs: Every effort has been made to secure permission and provide appropriate credit for photographic material. The publisher deeply regrets any omission and pledges to correct errors called to its attention in subsequent editions. Unless otherwise acknowledged, all photographs are the property of Scott Foresman, a division of Pearson Education. Photo locators denoted as follows: Top (T), Center (C), Bottom (B), Left (L), Right (R) Background (Bkgd) Opener: ©Peter Beck/Corbis; 2 ©M. H. Black/Robert Harding Picture Library Ltd., ©Randy Wells/ Corbis; 3 ©DK Images; 4 ©Sylvain Saustier/Corbis; 5 ©Ken Wagner/Visuals Unlimited, (TR) ©Eric and David Hosking/Corbis; 6 ©Byron Jorjorian/Bruce Coleman Inc.; 7 ©Stone/Getty Images; 10 ©Grant Heilman Photography; 12 ©Royalty-Free/Corbis; 14 (BC, CR) ©Royalty-Free/Corbis the use of scientific knowledge to solve problems a simple machine that is Copyright © Pearson Education, Inc. used to push things apart wedge ISBN: 0-328-13766-9 All Rights Reserved. Printed in the United States of America. This publication is protected by Copyright and permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permissions, write to: Permissions Department, Scott Foresman, 1900 East Lake Avenue, Glenview, Illinois 60025. wheel and axle a simple machine that is used to move things 3 4 5 6 7 8 9 10 V010 13 12 11 10 09 08 07 06 05 16 3. Tools make doing jobs faster and easier. Write to describe some of the tools used to make and serve dinner. Use words from the book as you write. 4. Put Things in Order What happens to a tree before it is cut in a mill? a simple machine that uses a wheel and rope to move things up and down simple machine a tool with few or no moving parts that makes work easier technology 2. What are simple machines? Name some simple machines and describe what they do.